Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4958ace5236f163…

MALICIOUS

PDF

16.7 KB Created: 2019-11-09 23:01:32 +00:00 Authoring application: mPDF 5.7
MD5: c36746c68b5f496d2424be3751733c1c SHA-1: 90db683372b555c8fe2c458942cec55174e2d1f3 SHA-256: c4958ace5236f163fec34246fafd722c78ba5343afee60e6da3e0232a6209250
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded external links, with the primary domain being 'cefasfese.4pu.com'. This suggests the document is designed to redirect users to potentially harmful content, possibly for SEO abuse or to host further malicious payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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/3731731732735739/The-Wolf-Within-by-Pamela-Belle.pdf
    • http://cefasfese.4pu.com/9730738732732737/Portobello-Belle-by-Pamela-Warren.pdf
    • http://cefasfese.4pu.com/3731730733738735/The-Silver-City-by-Pamela-Belle.pdf
    • http://cefasfese.4pu.com/1738730736739731/The-Moon-in-The-Water-Heron-1-by-Pamela-Belle.pdf
    • http://cefasfese.4pu.com/5730731733739733/A-Falling-Star-Wintercombe-3-by-Pamela-Belle.pdf
    • http://cefasfese.4pu.com/5732735731735/The-Last-Herald-Mage-Valdemar-The-Last-Herald-Mage-1-3-by-Mercedes-Lackey.pdf
    • http://cefasfese.4pu.com/3730737736739737/Wintercombe-Wintercombe-1-by-Pamela-Belle.pdf
    • http://cefasfese.4pu.com/8736735735731/Herald-by-N-F-Houck.pdf
    • http://cefasfese.4pu.com/3736730738736730/The-Herald-by-Dean-J-Baker.pdf
    • http://cefasfese.4pu.com/3738736736730739/The-Herald-The-Sundering-6-by-Ed-Greenwood.pdf
    • http://cefasfese.4pu.com/3735738739733738/Closer-to-the-Heart-The-Herald-Spy-2-by-Mercedes-Lackey.pdf
    • http://cefasfese.4pu.com/3737733732735732/The-Journals-of-Corrie-Belle-Hollister-Into-the-Long-Dark-Night-Land-of-the-Brave-and-the-Free-A-Home-for-the-Heart-Grayfox-The-Journals-of-Corrie-Belle-Hollister-6-8-by-Michael-R-Phillips.pdf
    • http://cefasfese.4pu.com/7737732739733730/The-recluse-of-Herald-Square-the-mystery-of-Ida-E-Wood-by-Joseph-A-Cox.pdf
    • http://cefasfese.4pu.com/7737737731734731/Hark-The-Herald-Angel-Screamed-by-Mignon-F-Ballard.pdf
    • http://cefasfese.4pu.com/1739739736735/Magic-s-Pawn-Valdemar-Last-Herald-Mage-1-by-Mercedes-Lackey.pdf
    • http://cefasfese.4pu.com/3735734732737/Magic-s-Promise-Valdemar-Last-Herald-Mage-2-by-Mercedes-Lackey.pdf
    • http://cefasfese.4pu.com/8737732739732739/Lark-The-Herald-Angels-Sing-Meg-Langslow-24-by-Donna-Andrews.pdf
    • http://cefasfese.4pu.com/4737732732730732/Magic-s-Pawn-Valdemar-Last-Herald-Mage-1-by-Mercedes-Lackey.pdf
    • http://cefasfese.4pu.com/8732737733734739/Genreflecting-A-Guide-to-Reading-Interests-in-Genre-Fiction-by-Diana-Tixier-Herald.pdf
    • http://cefasfese.4pu.com/1736738730733731/The-Twilight-Herald-Twilight-Reign-2-by-Tom-Lloyd.pdf
    • http://cefasfese.4pu.com/3737733732735732/The-Journals-of-Corrie-Belle-Hollister-Into-the-Lo

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