Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a509024ba340468…

MALICIOUS

PDF

97.7 KB Created: 2021-04-06 19:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 5591edfcb9e6407703cbf1ad97ca59d5 SHA-1: 1962f5cc3d8f41a7f5c393949ac97fdca502d589 SHA-256: 8a509024ba34046883cfc10faec332815c7be587d8c57968ee78ce5bb358c7ff
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. 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 clean score 0.1023

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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
  • 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://dugedepap.ru/wix?keyword=isometric+drawing+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/xelajuwodaf/ijggjbf/fegugezumewadixagekaxaze.pdfIn PDF document text
    • https://cdn.sqhk.co/wezokobuli/hhe6Bid/psd_web_templates_free_2018.pdfIn PDF document text
    • http://dinejokudino.22web.org/benelovutimolexijuvililuw.pdfIn PDF document text
    • https://pobejatu.weebly.com/uploads/1/3/2/7/132741278/wepotezagexulo-tazaximesuv.pdfIn PDF document text
    • https://zomurudol.weebly.com/uploads/1/3/4/4/134492975/4414580.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/UmMtUjj/hd_movies_free_2019_play_online_cinema_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/denepepunuja/XooHDu5/endless_war_origins_mod_apk_1._1._19.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/PvGhfQk/reverse_pec_deck_fly_muscles_worked.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/DGnZnge/96901029063.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d60e1d1-50c1-4e21-8cca-170f3819ba60/41073529264.pdfIn PDF document text
    • http://mulirogikek.epizy.com/acca_f8_pocket_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/568718a4-6ab3-4b73-99b5-0ecbff2aef05/libro_ciencias_2_fisica_secundaria_santillana_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c130f603-609f-4851-b464-8cbe0f5f74ee/the_best_quote_about_life_ever.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17547696-c5b4-4d4a-bf77-1c4592004870/line_6_spider_v_240hc_240w_head.pdfIn PDF document text
    • http://bukixusip.epizy.com/funidoxujezidevurotedeget.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e45d4b89-6730-478e-aa28-00995492bcce/54442431091.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c0ffa9c-973a-42ec-b1e9-8466c306fe8a/digno_eres_de_gloria_acorde_y_letra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bffeed79-19b5-469d-905f-81550c960ea7/39398420197.pdfIn PDF document text
    • http://lexepetilak.rf.gd/trig_identities_double_angle_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33ff121e-d9d8-431e-a5e6-763c65918abe/41825816283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2627ff-c05b-4ace-9085-4950083bdfc6/crosman_760_pumpmaster_scope_mount.pdfIn PDF document text
    • http://dejosabo.epizy.com/free_communique_templates.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000faf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAF6 6608 bytes
SHA-256: 87b02aeb4e97d82603ab114d8ee2cd794c06ba78943c2414b13c7dd02b32521b
font_01_sfnt_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 3604 bytes
SHA-256: 7eb8063553497036a038c66398daf020bcd542b9b5769a7db26c229d0442e3c0
font_02_sfnt_off00011825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11825 5416 bytes
SHA-256: 933688565eecdfc0c629a80eef066f00c3250aa1c9a865fc3e17e73cf1a652c4
font_03_sfnt_off00012a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A76 14232 bytes
SHA-256: b3f0b2810947fd10d4fafca4ae36fed6aaa984a5b046e82f162476413c54590a
font_04_sfnt_off00015a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A66 16760 bytes
SHA-256: 72073b7e8bc04a3f991c74e88d12d19bc5185fcaec7b61a78465c9e2418c7820
font_05_sfnt_off000171a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171A8 6068 bytes
SHA-256: fdde1cd8362e569e0912fc37582638f12c025ea64f9bf845cb70c65e3f65df81