Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf3a16e050d8faa…

MALICIOUS

PDF

73.9 KB Created: 2020-12-28 02:47:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 6926883cb1dab6e495ba4aa3f43cf510 SHA-1: eb5889285f35a47c1ec3b1d780b4efb4449a3357 SHA-256: adf3a16e050d8faa1c770b1e51d5724bf63aaf66925c11d0e9b8b9533bc068f4
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the presence of numerous external URIs points towards a phishing or SEO spam attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/strik?utm_term=race+of+kobe+bryant%2527+s+wife PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4428061/normal_5fdb7ba8a78a8.pdfIn PDF document text
    • https://zajubazo.weebly.com/uploads/1/3/4/4/134452036/86a0e0a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503279/normal_5fe9256b8edf0.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/kPNhg3e/mujuguxus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424632/normal_5f9ef2efee5ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426416/normal_5fc1ec09f27bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420468/normal_5fd915763aae5.pdfIn PDF document text
    • https://xameramavojipav.weebly.com/uploads/1/3/4/2/134265998/balodegujuvodakif.pdfIn PDF document text
    • https://laforefuje.weebly.com/uploads/1/3/5/3/135333455/cc9e9fa918c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5fac52a6c9d01.pdfIn PDF document text
    • https://tipuvativojodud.weebly.com/uploads/1/3/4/7/134754547/06e2aa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29326606-3b33-4e33-a4ff-92fd15a9c2ff/6818762341.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda1bb33-d251-4cd1-963a-3699a9bdf709/89262921607.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_off0000e33a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33A 5284 bytes
SHA-256: dc7699f543b70e09f71d3eef752d4cfa8b0a50d471bafa58c53d9184532284fe
font_01_sfnt_off0000f56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56C 10836 bytes
SHA-256: 8b5ba261e8a46c461fcdf6f5ccf116a1062cf7be021bf2bdb8f8eab58d5376d6

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