Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d6ebeb540dc49a…

MALICIOUS

PDF

129.5 KB Created: 2021-03-30 08:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8f018556d4eee4f37eb9dfc5d642bc44 SHA-1: 5b640fbedd1d4f86d0f27ee91a24782e1ae82a7d SHA-256: c2d6ebeb540dc49a26ce81079030431f4010c05d34a81f47aaa797f72ed46d8a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gimoguvi.ru/123?utm_term=bad+genius+english+subtitles++srt PDF link annotation
    • https://zememaxuzibur.weebly.com/uploads/1/3/5/3/135326459/ruwimawajipegu-jizisasowozav-fiwiras.pdfIn PDF document text
    • https://kuzefezatuxiwa.weebly.com/uploads/1/3/4/8/134898449/49258272130391.pdfIn PDF document text
    • http://obmenkalnr.online/javascript_get_absolute_position_of_element_on_pagemuq42.pdfIn PDF document text
    • http://prizinsta24.online/rogumaruzixavipusi2q10u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421062/normal_5fe56afca61ea.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/textbook_of_medical_biochemistry_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413236/normal_603652207e8f4.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/48172439611.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8f697b-0a16-4cfe-a523-bece707a35a2/what_is_the_pantone_colour_for_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dbdbf60-277f-4a57-9919-c7aed866a3d0/texukusetamozalajido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d54818-1f91-43c6-b58e-1cbc9e7165d4/lurofegis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b8d6204-d76d-4596-86b0-2cf7a8c2421a/three_phase_transformer_load_calculation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197c7c33-dc25-4cc1-9b21-a5087d90ad6e/how_to_access_voicemail_on_toshiba_office_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4805b4-b9e4-418e-bfe2-b82960aeebb6/zoom_h1_micro_sd_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c82390b-19b8-416a-8e25-d79e9f23abb3/margaritaville_machine_blender_replacement.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 16

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_017_off0001c313.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1C313 19040 bytes
SHA-256: 92ff4f83ce4177207aeeecbe9d33d093bd37508c862b11249ec08a49e2698ab4
font_00_sfnt_off0000dfee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEE 7916 bytes
SHA-256: b6d8f72b59c47e884b0b6746a25c5cbd96eb494928042fd8f7d2b0ad088f297a
font_01_sfnt_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 4032 bytes
SHA-256: a849b76f9363f6e208a6b3b97826a54f7c8e554eb642b232eb64e54d4f8be3d6
font_02_sfnt_off000102be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BE 5276 bytes
SHA-256: 9d526bf1d0ed52e67fb087d1e552b830d6fbd12293f6aa53cf23878118fd278f
font_03_sfnt_off000114a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A0 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_04_sfnt_off00011fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA5 4140 bytes
SHA-256: b7882c459d94d9fb05ee491b72d0ee9c35e8d4bc9ed5787c7a0b3ba78fd6bc86
font_05_sfnt_off00012cc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC3 3048 bytes
SHA-256: e23308bb06bff427f4fe2d795198e016b2e9db23d45fd702446b15ef1a1323d1
font_06_sfnt_off000138cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138CF 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_07_sfnt_off00014387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14387 2604 bytes
SHA-256: d4cda5a9ecb2558448f754249352cd4d73a8f7efff03060ee9a54ebf713292d1
font_08_sfnt_off00014e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E62 3840 bytes
SHA-256: 869700f7b438b0b0f23cfbf3a170597ae1a6b01e9ba9f60fe7298d5eefb98f81
font_09_sfnt_off00015c78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C78 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_10_sfnt_off00016656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16656 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_11_sfnt_off000173f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F6 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_12_sfnt_off000183d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x183D8 2780 bytes
SHA-256: 1ae293895bda4c6f6450701fa789431b1055dfa2aa1801e641cdaab082350f1d
font_13_sfnt_off00018fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FD0 17520 bytes
SHA-256: fde369327523f215d4b0ecb15ead0da4a68d40d6399f5309347359779b44c6f6
font_15_sfnt_off0001e2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E2E3 3536 bytes
SHA-256: 1cc80836e0a54a2c4db1185994f1ac0eab94f7f28d8d60f500043b8ef5b5dd0a

Open this report in the interactive analyzer, or submit your own file for analysis.