Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42d7110984db289…

MALICIOUS

PDF

68.3 KB Created: 2021-02-16 12:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2216bd8bd68768e6c9938f2103ad0701 SHA-1: 796aceffac1ef1fda48f82fb22b76aee12519187 SHA-256: f42d7110984db2896479afe3f42d0c7dafca556e3aca191ed6b47d03b117f114
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a URL that impersonates a printer driver download. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading malware. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the document suggest it's designed to facilitate the download of a second-stage 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://seumenha.ru/strik?utm_term=hp+laserjet+m1212nf+mfp+printer+driver+download PDF link annotation
    • https://cdn.sqhk.co/rufebumu/jcfihjT/38258857746.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470226/normal_5fe00a00db922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483602/normal_5fc7dd2e025c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379489/normal_5ff508680b091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416128/normal_5fe53ebab9ee2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_6002e53f74fde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_601cd3f38232a.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/jeV1jeU/43477296596.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/jnrDMhj/xopemegawavozobijuvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452152/normal_5fdbfcfd1d8f8.pdfIn PDF document text
    • https://cdn.sqhk.co/jidobimatu/hSfGprJ/entrepreneur_quotes_for_instagram_bio.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373999/normal_600baccf7971d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373527/normal_5fce0f13f26fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5fdc452807229.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377109/normal_5fec905819810.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1F6 5348 bytes
SHA-256: 1b4ca4514633589deaacc72738b9286ddd25bd6ac121135f5bcf058b764e863f
font_01_sfnt_off0000d42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD42A 9900 bytes
SHA-256: abd6daa5272840bb410d552943e4d311a4d2a4d017b84996bc53a415f05e6df8
font_02_sfnt_off0000f61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61A 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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