Malicious PDF — malware analysis report

Static analysis result for SHA-256 142b4022480da06d…

MALICIOUS

PDF

144.8 KB Created: 2021-04-24 05:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 4952b0c1e6e823594925ee56df8b2f47 SHA-1: 19d501ed34bf5052841e133576d77033ff4756f2 SHA-256: 142b4022480da06dfc331a57b1581d4b444feb7c46f9cf4eea9ac43e09d3bef6
126 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to suspicious domains, suggesting a link farm designed to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination. No scripts were extracted, but the overall structure and URL distribution point to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8396

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 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://www.termis.org/system/files/webform/dexifivoneput.pdf In PDF document text
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/3563422068.pdfIn PDF document text
    • https://www.osgeurope.com/sites/osg-corporate.dev/files/webform/memirudomonejusowanasu.pdfIn PDF document text
    • http://russian-ice-spb.ru/sites/default/files/webform/files/69309865186.pdfIn PDF document text
    • http://klm3fg.grhosting.cz/sites/default/files/webform/files/30253637425.pdfIn PDF document text
    • https://www.blplegal.com/sites/default/files/webform/lolavojirubopikumu.pdfIn PDF document text
    • https://www.dgs-interparts.be/sites/default/files/viwiredozilopuvotudulufez.pdfIn PDF document text
    • http://cicatsalud.com/html/sites/default/files/webform/99284441703.pdfIn PDF document text
    • http://oaklandchildcare.org/sites/default/files/webform/80411930416.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://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=d%2526d+book+of+exalted+deeds+pdfPDF link annotation
    • https://www.healthdata.org/sites/default/files/resumes/58023923203.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://www.gnu.org/licenses/lgpl.htmlRegularDanhHongIn PDF document text
    • http://www.geocities.com/dnhhngIn 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
    • http://scripts.sil.orgIn PDF document text

Extracted artifacts 17

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_016_off0001f14b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1F14B 19380 bytes
SHA-256: fe2a5b1e0db069a79176a433911fc1acc1f90a34d8006d0dff9401b5cf05df50
font_00_sfnt_off0001012d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012D 7916 bytes
SHA-256: b6d8f72b59c47e884b0b6746a25c5cbd96eb494928042fd8f7d2b0ad088f297a
font_01_sfnt_off0001158c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158C 8368 bytes
SHA-256: 11a70e4511db029bc81d6cfccb293e860fb34fd879bcd24a12bea0c573581572
font_02_sfnt_off000131f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F7 4156 bytes
SHA-256: d9d9eb8b5a67a8494ca5a9593d54773c41ba913a17cb426b52e0a193c0b11448
font_03_sfnt_off00014021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14021 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_04_sfnt_off00014b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B26 4140 bytes
SHA-256: b7882c459d94d9fb05ee491b72d0ee9c35e8d4bc9ed5787c7a0b3ba78fd6bc86
font_05_sfnt_off00015844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15844 3048 bytes
SHA-256: e23308bb06bff427f4fe2d795198e016b2e9db23d45fd702446b15ef1a1323d1
font_06_sfnt_off0001644a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1644A 4544 bytes
SHA-256: 059070cd149d8977ca78cfd4fb95e986a02e671cdb4f7bc81c5301fc7fc55836
font_07_sfnt_off00017250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17250 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_08_sfnt_off00017d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D08 2604 bytes
SHA-256: d4cda5a9ecb2558448f754249352cd4d73a8f7efff03060ee9a54ebf713292d1
font_09_sfnt_off0001881e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1881E 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_10_sfnt_off000191b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191B7 3840 bytes
SHA-256: 869700f7b438b0b0f23cfbf3a170597ae1a6b01e9ba9f60fe7298d5eefb98f81
font_11_sfnt_off00019fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FCF 4336 bytes
SHA-256: 87016e8933cc862d1d188edfbee698abcff8178ed3d6b510b61737ee02f60284
font_12_sfnt_off0001ad6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AD6F 6148 bytes
SHA-256: 0b38f6fd5e0b54bfa22d5adee1cfe00629fe134100fc7cfc1ad14a2ab7974207
font_13_sfnt_off0001bd59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD59 18140 bytes
SHA-256: 4d2114e51a238a37be5fa9134fd1ad6317cdc29da19f4a6fbf8231fe611e103e
font_15_sfnt_off000212b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x212B8 3612 bytes
SHA-256: 59ba68889a6ddfc00e7c371aa63d253c82c2fd60b6adad43b7b5c23629b027ac
font_16_sfnt_off000220d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220D8 4216 bytes
SHA-256: a1cdd12e7202d5b84db6fb10a0d71bc51fe40057a00e34d9df4032cbf4e7d52e

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