Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b5c60a0b5f7d88…

MALICIOUS

PDF

75.6 KB Created: 2021-02-23 09:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c1c93244b05f26bb7c150f41ad7d2684 SHA-1: ee001a0d5171df7bb56e3eeb571b69ef0d173bfb SHA-256: 79b5c60a0b5f7d88b430abc22fab50979305e707d3d1cbef36e808b6aa2f4531
96 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://seumenha.ru/strik?utm_term=2004+dodge+ram+pickup+1500+quad+cab+length', which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it might be a crafted lure. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly suggest it's used as a delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://seumenha.ru/strik?utm_term=2004+dodge+ram+pickup+1500+quad+cab+length PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fef66cdae7db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_6025dd84b870f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382429/normal_6024954cb93d1.pdfIn PDF document text
    • http://doordash.link/23924417148m1th0.pdfIn PDF document text
    • https://cdn.sqhk.co/redusebi/jk1iagi/zejefemov.pdfIn PDF document text
    • http://ketrovk.xyz/vonokezovogemidutafp7n2t.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/hjjaicd/freeway_roc_da_mic_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/ggNgjFZ/51982892719.pdfIn PDF document text
    • https://cdn.sqhk.co/kivutuzo/SKJghgf/yellow_finch_feeder_best.pdfIn PDF document text
    • https://cdn.sqhk.co/sufokorume/1gjdggw/dokiburekivalis.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/ML8jaFb/sirunisusujekusiw.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/giHhjii/plumber_install_water_heater.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/jQ8l9hh/58123824348.pdfIn PDF document text
    • http://liketime.online/rosojegimedfuq7i.pdfIn PDF document text
    • https://cdn.sqhk.co/fugolamudara/EGijidT/10th_std_maths_digest_maharashtra_board.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475571/normal_5ffb582abe273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499317/normal_603434f534e22.pdfIn PDF document text
    • http://begemot.space/73768815001dzh7e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fee732600145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495034/normal_5fda7380358be.pdfIn PDF document text
    • https://cdn.sqhk.co/tilafukefuwe/j1gdlmQ/68759621331.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/dgjj3ji/pozog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 6084 bytes
SHA-256: e1be0f4ba7b774d9066a9707752731ddd2b52a0fc4c86bf99908ad3b6e1b0124
font_01_sfnt_off0000f9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A6 11492 bytes
SHA-256: c11adf0b9b8596cc2f2d3eda223a137b2cb61a280fc6e32592d8c4ae0e06a739

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