Malicious PDF — malware analysis report

Static analysis result for SHA-256 274e01a4376591f6…

MALICIOUS

PDF

62.9 KB Created: 2021-02-26 14:46:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87ec007cdc640322b6295f1023ef5b0c SHA-1: be7a519be386d1a2ca007ccbd3ddb162d36c5cad SHA-256: 274e01a4376591f6c197737cf89b72763084562013cd7b10ce85d3f2abf8c031
154 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and flagged by an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it functions as a link farm for SEO manipulation or to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards techniques used for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8940

Heuristics 4

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://lozipotod.ru/123?utm_term=is+the+lexus+rx350l+longer+than+the+rx+350
    • https://xedutorapul.weebly.com/uploads/1/3/0/8/130813372/jananupalibu.pdf
    • https://cdn.sqhk.co/riwifesineji/hhwAie0/5380803256.pdf
    • https://cdn.sqhk.co/govonesed/yVgcQel/mobile_kitchen_trailer_for_sale.pdf
    • https://cdn.sqhk.co/sowotewope/jbidjdg/belus.pdf
    • https://cdn.sqhk.co/nufesewepi/SthcWjj/western_hills_motel_bowling_green_ky_42101.pdf
    • https://cdn.sqhk.co/xutazazo/jhFfFib/banipanuxum.pdf
    • https://wabatopopelak.weebly.com/uploads/1/3/0/7/130775953/1151248.pdf
    • http://mejepaxozamasi.22web.org/6972072351.pdf
    • http://sefajoga.iblogger.org/basic_electrical_engineering_mcq_questions_and_answers_free_download.pdf
    • https://pazisurezufil.weebly.com/uploads/1/3/4/5/134594691/viwomifi.pdf
    • https://cdn.sqhk.co/pigexebobe/aLgjOjh/gem_hunting_in_north_georgia.pdf
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/0548bc4d39c864f.pdf
    • https://cdn.sqhk.co/noneniwetav/iaggwH6/doodle_halloween_2.pdf
    • https://cdn.sqhk.co/bisidilit/chaXggO/9789127907.pdf
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/9985031.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d8.bin
eccb2762ca54dc9f17444e088fc20331be3cad93f6bbb4144b85009a6abfd267		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 5384 bytes

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