Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c395587d793440…

MALICIOUS

PDF

61.1 KB Created: 2020-12-04 11:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34a6a0e3e5922494af27eae2cffa48c0 SHA-1: a5872ce6182e8b509189f48a750f1df110839cee SHA-256: f6c395587d793440127a30339f5c7a522666f6b8712e54dcaa47f273ab1c10ef
212 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, with at least one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of outbound links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature, pointing towards phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7689

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://ggtraff.ru/aws?utm_term=docker+books+free
    • https://puzileto.weebly.com/uploads/1/3/4/6/134674509/8165658.pdf
    • https://weludabaner.weebly.com/uploads/1/3/4/8/134854782/edf2b1edc1ba.pdf
    • https://fuwewarudizikip.weebly.com/uploads/1/3/4/6/134644733/dawudovadonakixukom.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/e5fc12a7-5c74-42cc-9ac6-72250f6c8356/rafirexe.pdf
    • https://static1.squarespace.com/static/5fc0d4752bbd7406580625ec/t/5fc3537f7acac6192a2ad27a/1606636415587/characteristics_of_waves_worksheet_answers.pdf
    • https://uploads.strikinglycdn.com/files/4e478dd2-90d5-46d0-b4a6-8bf37fa340a5/limiting_and_excess_reactants_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/2797daee-46fe-4890-9074-feaabc63118e/27193878597.pdf
    • https://uploads.strikinglycdn.com/files/e68a59da-66c7-4175-ac58-e2e495ec3f5e/federal_court_ri_117_cv_00057_itw_vs_esposito.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6ab7f8cdb769c6db44c4/1606380216453/free_breakout_games_to_play_online.pdf
    • https://uploads.strikinglycdn.com/files/db00ae50-c0d9-4c86-b41d-41b6a32da0cb/hegner_scroll_saw.pdf
    • https://static1.squarespace.com/static/5fc342e327a199023ac4b189/t/5fc95c02d71767337b519465/1607031810303/zosarefakukuguxuzuf.pdf
    • https://uploads.strikinglycdn.com/files/b99720df-474a-4fb8-903a-c7b288eaa9c9/sokexukolumetidovebevi.pdf
    • https://s3.amazonaws.com/zuxadol/widavekuw.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c854.bin
9790987ea1b270d79b843901eb9646b70f9c14403b921d6fbd4f371efd3fe3eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC854 4836 bytes

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