Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8452ed6568325f1…

MALICIOUS

PDF

20.1 KB Created: 2019-05-03 20:28:47 +01:00 Authoring application: mPDF 5.7
MD5: e58cb67da497560bb932d55f1cc25031 SHA-1: f1d725fac03720ab9549175cfcc907c1f8311ce1 SHA-256: b8452ed6568325f15608273afbde7b78f607effc587736d5a10aa1a8d1e246df
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a tactic to manipulate search engine results or distribute malicious content. While the document body is unreadable, the presence of numerous links to external PDFs, even if currently marked as benign, indicates a suspicious distribution pattern. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 2

  • 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.
  • 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 http://cefasfese.4pu.com/6738736730732731/Ormond-Or-the-Secret-Witness-by-Charles-Brown.pdf
    • http://cefasfese.4pu.com/6738736730733731/Ormond-Or-the-Secret-Witness-by-Charles-Brown.pdf
    • http://cefasfese.4pu.com/6738736730733737/Ormond-Or-the-Secret-Witness-by-Charles-Brockden-Brown.pdf
    • http://cefasfese.4pu.com/6738735739735739/Ormond-Volume-I-of-3-or-The-Secret-Witness-by-Charles-Brockden-Brown.pdf
    • http://cefasfese.4pu.com/7731735730733/The-Witness-by-Sandra-Brown.pdf
    • http://cefasfese.4pu.com/9736731730737734/Silent-Witness-The-Karla-Brown-Murder-Case-by-Don-W-Weber.pdf
    • http://cefasfese.4pu.com/8731733739739734/Witness-to-Witchcraft-by-Charles-LeFebure.pdf
    • http://cefasfese.4pu.com/3731735737736/Mute-Witness-Anne-Cartier-1-by-Charles-O-39-Brien.pdf
    • http://cefasfese.4pu.com/2733738734739733/Noble-Obsession-Charles-Goodyear-Thomas-Hancock-And-The-Race-To-Unlock-The-Greatest-Industrial-Secret-Of-The-Nineteenth-Century-by-Charles-Slack.pdf
    • http://cefasfese.4pu.com/6738735739736731/The-Julia-Ormond-Handbook---Everything-You-Need-to-Know-about-Julia-Ormond-by-Emily-Smith.pdf
    • http://cefasfese.4pu.com/1730739732733738735/Articles-on-Novels-by-Agatha-Christie-Including-Crooked-House-the-Secret-Adversary-N-or-M-the-Seven-Dials-Mystery-the-Secret-of-Chimneys-the-Man-in-the-Brown-Suit-the-Sittaford-Mystery-Why-Didn-t-They-Ask-Evans-Murder-Is-Easy-by-Hephaestus-Books.pdf
    • http://cefasfese.4pu.com/4732735731739735/Silent-Witness-Witness-Series-2-by-Rebecca-Forster.pdf
    • http://cefasfese.4pu.com/4737731739738731/The-Secret-Keeper-Confined-The-Secret-Keeper-2-by-Brea-Brown.pdf
    • http://cefasfese.4pu.com/8736739737730732/Wieland-s-Madness-by-Charles-Brockden-Brown.pdf
    • http://cefasfese.4pu.com/2736733739731733/A-Charlie-Brown-Christmas-by-Charles-M-Schulz.pdf
    • http://cefasfese.4pu.com/2738736739733730/The-Secret-of-Blackjack-Woods-by-Ashlen-Brown.pdf
    • http://cefasfese.4pu.com/4730732732739737/Why-Charlie-Brown-Why-A-Story-about-What-Happens-When-a-Friend-Is-Very-Ill-by-Charles-M-Schulz.pdf
    • http://cefasfese.4pu.com/3736734732735732/It-s-the-Great-Pumpkin-Charlie-Brown-by-Charles-M-Schulz.pdf
    • http://cefasfese.4pu.com/2735735735739737/It-s-the-Great-Pumpkin-Charlie-Brown-by-Charles-M-Schulz.pdf
    • http://cefasfese.4pu.com/2739732737733732/Arthur-Mervyn-Revised-Edition-by-Charles-Brockden-Brown.pdf

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