Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a6ab2bc45ac2bd5…

MALICIOUS

PDF

73.9 KB Created: 2021-02-16 19:48:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 4ee814d38b54602a8cca82a6cd99f26a SHA-1: 0d42932d70a0693df6fcf1e6c481880dad80ac52 SHA-256: 3a6ab2bc45ac2bd56782118291f95c2b8ce60bd55d219f74947c6d31d3f63aef
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://bologen.ru/wix?keyword=cuisinart+tob-260n1+air+fryer', which is likely part of a phishing or credential harvesting scheme. 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 lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=cuisinart+tob-260n1+air+fryer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382209/normal_601399b3479ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465388/normal_5fdad352e0c0b.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/XxRNhcK/call_of_duty_mobile_zombies_2020.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/foreigner_cold_as_ice_sheet_musicsyc4y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5fe96fa3a6bf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418383/normal_602b06d09000d.pdfIn PDF document text
    • http://lanufutado.22web.org/plain_backgrounds_for_photoshop_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477651/normal_5fca780e6bf61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_6010b07cddf5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420592/normal_60133497233ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422628/normal_5fec2f1b8768a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387706/normal_5fdb54ff06413.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_60187c2ee95aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobejuk.rf.gd/attributes_of_god_tozer.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 5388 bytes
SHA-256: 7a795fa8c84c6eacc5fe06a902bee594928c5ae17f1a3df28e5b04a690630075
font_01_sfnt_off0000f679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF679 10520 bytes
SHA-256: 4323b4e862b106283f313a230a0ebd02f9434c260130f84eb3fdfc130fc9231a