Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e71d5225987fbed…

MALICIOUS

PDF

79.9 KB Created: 2021-02-13 12:03:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4a72a5731e1d3cbb489cc5300554e27d SHA-1: 22767b3b0b1cce85d25887f3ef88830bab8abf92 SHA-256: 1e71d5225987fbedd5f9cf5070804b678cb5a7f1f9e548a9ee74dc5e0f14e298
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content. The primary malicious indicator is the embedded URL pointing to a suspicious domain, likely intended to host a phishing page or download a secondary payload.

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://jacksth.ru/wix?keyword=a+love+to+last+july+12th PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5ff6725876bc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_6017081680bcb.pdfIn PDF document text
    • http://itfamily.info/lapuguxurozulizejak5lmuu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387589/normal_600a3c4989494.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/eojb5EL/nudopex.pdfIn PDF document text
    • http://socialwave.me/electron_energy_and_light_answersr0wk9.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/VShaidv/mansion_blast_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379971/normal_6017be9f8d8b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5fc9ff71c9727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_600e11a0d15ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390996/normal_600a084ec97cc.pdfIn PDF document text
    • http://lasns.fun/6th_grade_math_review_testdgh2h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474736/normal_5ffa44415527e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391335/normal_6026dc9406d97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463300/normal_5fefd5603a864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388174/normal_600305b00e803.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/hijfhic/draw_me_close_to_you_lyrics_donnie_mcclurkin.pdfIn PDF document text
    • http://tersq.fun/857773597248pgp8.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/20gj2rf/33317304976.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_off0000fd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD90 5088 bytes
SHA-256: c61621fa5b1e4281ed298dd14485b01174ce3cce8078a58fa899d2ce70263852
font_01_sfnt_off00010ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF5 10248 bytes
SHA-256: eaebb1507bebf0e74c2b8c31dd737d19dc2c916d0f99428a55e3ec5fe0ba0928

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