Malicious PDF — malware analysis report

Static analysis result for SHA-256 610022f233d75eb2…

MALICIOUS

PDF

73.5 KB Created: 2021-01-09 12:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96781856cf46876d1a3ee181d96bcb90 SHA-1: d4c0ff9bae5ad6a05d5e0ae3def56bbeb0267c2a SHA-256: 610022f233d75eb2af65c463a70b51d3ea9a579ea51b1a4aed879bc71e4af3d3
96 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URL that mimics a legitimate document title, suggesting a phishing or social engineering lure. While no scripts were explicitly extracted, the PDF structure and embedded URI indicate it's designed to redirect users to a potentially harmful external resource.

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://trafficel.ru/123?utm_term=warhammer+warriors+of+chaos+8th+edition+army+book+pdf
    • https://cdn.sqhk.co/bajipugotox/Ue4gdgd/15847117427.pdf
    • https://cdn.sqhk.co/jakufomego/L3v9ahi/5071701927.pdf
    • https://cdn.sqhk.co/joxesinejag/emgjvid/1410054429.pdf
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fcede8cc18a5.pdf
    • https://cdn.sqhk.co/nonuripot/hgijSib/73793750300.pdf
    • https://cdn.sqhk.co/rurokusulos/EBPjgji/screen_recorder_for_windows_10.pdf
    • https://cdn-cms.f-static.net/uploads/4404296/normal_5f978f6aabc68.pdf
    • https://cdn-cms.f-static.net/uploads/4421205/normal_5f9ab83fc808b.pdf
    • https://cdn-cms.f-static.net/uploads/4407991/normal_5fb0030ade9d4.pdf
    • https://cdn-cms.f-static.net/uploads/4389601/normal_5fa067737a2f5.pdf
    • https://cdn.sqhk.co/nozujeraguje/edgcjh2/bipuva.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/649323ae-9898-43c3-9a9c-b9de6bd82e9a/12018583562.pdf
    • https://s3.amazonaws.com/vufupu/missouri_commercial_driver_license_manual.pdf
    • https://s3.amazonaws.com/silubebebefuju/small_merge_split.pdf
    • https://uploads.strikinglycdn.com/files/691fc7f8-76ca-4cad-b3cc-d0c78cf54846/gosawozejiwurudixuwovubaf.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_off0000dfc5.bin
69e09188644fbe90ecfb877df31173c2568f09f73eaaac5b72a0cd164c2006d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5968 bytes
font_01_sfnt_off0000f40b.bin
d49105270a97c350e3449da73ceb87a62641d4dbed84213c01e0a6518463a38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF40B 10648 bytes

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