Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d10d1c0deb11c31…

MALICIOUS

PDF

157.4 KB Created: 2021-04-03 12:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce59697b538568c3b483e5ba74399b97 SHA-1: 9d03bdf7269145f0b8d6b51276a404d2ea3c5143 SHA-256: 1d10d1c0deb11c31c538ea8965f5474018987432d7bebb00e7c2efc3db6ff8fe
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://nipisod.ru/wix?keyword=100+percent+complete+walkthrough', which is likely a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, further supporting the idea that the embedded link is central to its malicious function.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/wix?keyword=100+percent+complete+walkthrough
    • https://biripujoj.weebly.com/uploads/1/3/5/3/135338152/cbca1.pdf
    • http://sexesex.site/rc_gyrocopter_kit2eq4p.pdf
    • http://confirmationhelpcenter.com/36560378662a3mqh.pdf
    • http://contact-git.top/22610455828h45qr.pdf
    • http://gufutaca1.xyz/un_curso_de_milagros_leccion_150lubhq.pdf
    • http://life50it.pro/samsung_bd-f5700_resetlxw61.pdf
    • http://nowtorrentz.com/lefivevifopfgd7z.pdf
    • https://godanikepogi.weebly.com/uploads/1/3/4/5/134509841/xepev.pdf
    • https://sonalopuxarore.weebly.com/uploads/1/3/4/3/134310538/724b4.pdf
    • http://nncucuucuc.space/pafasoderoweteradejemara9sghq.pdf
    • http://ketadiets.site/warhammer_fantasy_battle_mapbum7s.pdf
    • http://maewallace.com/2011_acura_mdx_cost_of_ownershipu71zj.pdf
    • https://zejenabo.weebly.com/uploads/1/3/0/9/130969472/mikukelodomomu-rafuvewaraj-kigipafajonelax-fomazemaduj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3e4777be-8ea4-42ac-8c93-27af4a41e44c/how_to_make_a_line_graph_from_a_data_table_in_excel.pdf
    • https://dc58184e-bbba-402a-8e08-a55d552c8f3f.filesusr.com/ugd/0ebc1f_c60cf2c0fde84fadbf5feb98bf130866.pdf?index=true
    • https://s3.amazonaws.com/sewamos/what_does_radical_republican_means.pdf
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_5c586b2e3c9b4a8496de5180e8cd0694.pdf?index=true
    • https://uploads.strikinglycdn.com/files/901f8cc6-066c-4ac0-9ff9-158e8919b113/what_is_cultural_mapping_all_about.pdf
    • https://uploads.strikinglycdn.com/files/a18718b3-cf8c-4871-a351-4c1568308fbe/gekamuzitetezamiwem.pdf
    • https://2f8a6ab9-e864-4757-b083-6627a13f4c48.filesusr.com/ugd/405339_c4dbde51b33d48dfbff6a9f05095ba25.pdf?index=true
    • https://s3.amazonaws.com/nilafafakem/gegilerotesetimoziredu.pdf
    • https://uploads.strikinglycdn.com/files/b27baac6-8f3f-4fc8-a9ad-b637fbbe631d/sufufoteva.pdf
    • https://s3.amazonaws.com/pavujiniz/72723976333.pdf
    • https://s3.amazonaws.com/sazariwapa/13267539921.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022ef1.bin
1bbbf6ae8c7e80b97f29a49c4655aaad39618b308575e2404d9c77b59aa2b450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22EF1 5424 bytes
font_01_sfnt_off00024152.bin
bb391287d69ccdd730697e88daceca9960c3a7c50fe709c7cdc16a79b084fec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24152 11404 bytes

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