Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab20885565102571…

MALICIOUS

PDF

14.7 KB Created: 2019-05-02 06:09:23 +01:00 Authoring application: mPDF 5.7 First seen: 2021-05-29
MD5: c131469ac32f8c5cd2d6bb9263a4efc1 SHA-1: 2e7d1b8f14eec71d8875f872c7e4838ee1bece9d SHA-256: ab20885565102571a2743a3efdf152f798efb2e246736c1dfd4880d0b3086b27
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by an ML classifier and exhibits a PDF SEO link farm heuristic, indicating it contains numerous external links. These links point to PDF files hosted on the 'cefasfese.4pu.com' domain, suggesting a potential attempt to manipulate search engine results or distribute further malicious content. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/4735733734732739/Fools-Die-by-Mario-Puzo.pdf In PDF document text
    • http://cefasfese.4pu.com/7731734736732737/The-Godfather-by-Mario-Puzo.pdfIn PDF document text
    • http://cefasfese.4pu.com/5735730730734736/The-Godfather-by-Mario-Puzo.pdfIn PDF document text
    • http://cefasfese.4pu.com/3732732731738/The-Godfather-by-Mario-Puzo.pdfIn PDF document text
    • http://cefasfese.4pu.com/4730733739736/The-Family-by-Mario-Puzo.pdfIn PDF document text
    • http://cefasfese.4pu.com/9732739739733737/The-Dark-Arena-by-Mario-Puzo.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730730730735735734/The-Godfather-Returns-A-New-Novel-Based-on-the-Corleone-Family-Characters-Created-by-Mario-Puzo-by-Mark-Winegardner.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730732733730/I-Am-Pilgrim-Pilgrim-1-by-Terry-Hayes.pdfIn PDF document text
    • http://cefasfese.4pu.com/4731734730732737/I-Am-Pilgrim-Pilgrim-1-by-Terry-Hayes.pdfIn PDF document text
    • http://cefasfese.4pu.com/9734735733731/The-Way-of-a-Pilgrim-and-the-Pilgrim-Continues-His-Way-by-Anonymous.pdfIn PDF document text
    • http://cefasfese.4pu.com/4737732738734/I-Am-Pilgrim-Pilgrim-1-by-Terry-Hayes.pdfIn PDF document text
    • http://cefasfese.4pu.com/3734738730738/Scott-Pilgrim-Volume-1-Scott-Pilgrim-s-Precious-Little-Life-by-Bryan-Lee-O-39-Malley.pdfIn PDF document text
    • http://cefasfese.4pu.com/4730738736739/Scott-Pilgrim-Volume-4-Scott-Pilgrim-Gets-It-Together-by-Bryan-Lee-O-39-Malley.pdfIn PDF document text
    • http://cefasfese.4pu.com/4738730735734735/Scott-Pilgrim-Vol-2-Scott-Pilgrim-vs-the-World-by-Bryan-Lee-O-39-Malley.pdfIn PDF document text
    • http://cefasfese.4pu.com/2738733730733733/Harlowe-Pilgrim-s-Oh-My-Words-2014-by-Harlowe-Pilgrim.pdfIn PDF document text
    • http://cefasfese.4pu.com/9735738737731736/Fortunate-Sum-by-M-Ullrich.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730732730733735732/Falling-for-Him-Fortunate-3-by-Jessica-Roe.pdfIn PDF document text
    • http://cefasfese.4pu.com/8732737731738/Fortunate-Son-by-Walter-Mosley.pdfIn PDF document text
    • http://cefasfese.4pu.com/1737739738734739/The-Fortunate-Buddha-by-Heather-Long.pdfIn PDF document text
    • http://cefasfese.4pu.com/1737730732733732/A-Fortunate-Complication-Everywoman-2-by-Aischa-Zorindell.pdfIn PDF document text

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