Malicious PDF — malware analysis report

Static analysis result for SHA-256 2061806469ff4411…

MALICIOUS

PDF

69.3 KB Created: 2020-11-12 21:41:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e9dce37f2c854215817e244a50b335 SHA-1: eb03328d07f2f8136ff24f661e7f737f72f8b9bb SHA-256: 2061806469ff4411379afe45ef05663ec9f5db8a253bd732d9ee4bfe6e1e78e9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO spam or phishing campaigns. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to English human body parts in PDF format, directing users to a suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/aws?utm_term=human+body+parts+name+in+english+pdf
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/vuzozagosirom.pdf
    • https://sipobazi.weebly.com/uploads/1/3/4/4/134494275/nufefefalavozegukuda.pdf
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fa4afc3d6eef.pdf
    • https://fejilezujew.weebly.com/uploads/1/3/4/3/134340931/7011b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kakef/lekubalilik.pdf
    • https://s3.amazonaws.com/jivala/fidodesapotesokevifenan.pdf
    • https://s3.amazonaws.com/zupenafud/accidentally_in_love_full_book_download.pdf
    • https://s3.amazonaws.com/bejideba/90100860193.pdf
    • https://s3.amazonaws.com/lusegokaves/metizej.pdf
    • https://s3.amazonaws.com/megodipewukitoj/6779176020.pdf
    • https://s3.amazonaws.com/pojojagajevuxa/tenaxagadivusaxe.pdf
    • https://s3.amazonaws.com/waxejajinigafu/maritime_documentation_center.pdf
    • https://s3.amazonaws.com/gumagabu/zujakaboposefunomejib.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_off0000d143.bin
6ee14af6d8b32e33ef5787b878998c4f0cc4ca156d0979edfd5a7f46c776ab1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD143 5660 bytes
font_01_sfnt_off0000e451.bin
feda763793f1e34b47d7764f8d3feb75279db1b10d9b29b3af904637c75a28ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE451 10780 bytes

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