Malicious PDF — malware analysis report

Static analysis result for SHA-256 67fa0f0cbfbd7579…

MALICIOUS

PDF

79.2 KB Created: 2021-03-07 17:52:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1793e879b13e6edbbcfc8707f123855 SHA-1: 238d17706c67c2ad97d063a336063e801c322b59 SHA-256: 67fa0f0cbfbd75796de60c958fcafd0dee849143c7060ac053152295a028c68d
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, includes metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple embedded URLs further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dafemum.ru/strik?utm_term=bhagavad+gita+chapter+2+verse+54+meaning
    • https://cdn.sqhk.co/labifikup/hjhbWcb/amazon_prime_day.pdf
    • https://zulezinema.weebly.com/uploads/1/3/0/7/130776370/723ebcc670b154.pdf
    • https://pawiwojofidinof.weebly.com/uploads/1/3/4/4/134458390/tigofur.pdf
    • https://cdn.sqhk.co/gefimiwotux/igkGGic/gotujowox.pdf
    • https://static.s123-cdn-static.com/uploads/4415527/normal_5ff680e1be8fa.pdf
    • https://static.s123-cdn-static.com/uploads/4377113/normal_60001a1f6dc68.pdf
    • http://liko-sneakers.com/ciencias_sociales_7_santillanaaxmtu.pdf
    • http://sfr-webmail.com/36153565364pm8ni.pdf
    • https://static.s123-cdn-static.com/uploads/4460982/normal_6002be10a160a.pdf
    • https://guwulazavuwaba.weebly.com/uploads/1/3/2/3/132302871/8880223.pdf
    • https://cdn.sqhk.co/janezewufaj/jyjhjiI/30823521403.pdf
    • https://cdn-cms.f-static.net/uploads/4374199/normal_5fdc38a155a4a.pdf
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/dabijamefam.pdf
    • https://cdn.sqhk.co/vekokizijam/Oiaheha/podegumosovowa.pdf
    • https://static.s123-cdn-static.com/uploads/4485578/normal_6005cf148fbbc.pdf
    • http://cardioactiveuficiale.site/libro_juego_de_tronos_venta_chilezkyqx.pdf
    • http://shoop-fg.ru/denovajalimurejederosesil42u5.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/712be1b3-d4c1-40d3-8f5d-77508d2af875/motuw.pdf
    • https://uploads.strikinglycdn.com/files/83cc9c8e-f14c-4cab-9bae-0039adb3b716/what_are_good_ideas_for_a_persuasive_essay.pdf
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_9d745a285e25489f8280b16ba2a2ae12.pdf?index=true
    • https://dda5c79a-a75d-44d9-a006-48dec3bfe172.filesusr.com/ugd/115d6e_8006f5e43012403397c446a35cf0d65b.pdf?index=true
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_222afb92aa1f4dc7b2825fcf3cfa6381.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e3fd3091-abab-430f-ae46-07bb9cdb3a33/33024923757.pdf
    • https://uploads.strikinglycdn.com/files/09d6138a-0fe2-4643-ae6c-fa91b8bd3fa4/pavuxivadolovululiw.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_off0000f540.bin
2a2c8d12a65e349951bad77c5c2dd8a450dcb56d19b3b236af9dfb40e10c231d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 5908 bytes
font_01_sfnt_off0001094d.bin
620b60f2805df0fa9480b40eca73b997ce8fa08f0a9b9e3b325d98e08cc151f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1094D 11696 bytes

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