Malicious PDF — malware analysis report

Static analysis result for SHA-256 b23ed88df79ff5ea…

MALICIOUS

PDF

16.2 KB Created: 2019-05-02 05:17:48 +01:00 Authoring application: mPDF 5.7
MD5: a79539a9bded374c9228f9bf24caab7b SHA-1: 6b2f8628fbe517813472ab411c500fad71b03883 SHA-256: b23ed88df79ff5eaa2af75f59e6bc18a61bd6f753bf782e027f9bf7687952840
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external websites, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are marked as benign, the sheer volume and structure suggest a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was heavily obfuscated, preventing a more detailed analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

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://loaminoo.linkpc.net/2090093090094098/Miss-Mary-s-Husband-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/2090093093090093/Husband-Material-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/4099098090092091/Tempered-by-Fire-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/6097092091093098/Leonie-s-Luck-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/2090093091096095/King-of-the-Hill-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/2090093092098091/The-Baby-Caper-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/2090092099095094/Silence-Speaks-For-Love-by-Emma-Goldrick.pdf
    • http://loaminoo.linkpc.net/1091090096095091096/Miss-Mary-Mack-by-Mary-Ann-Hoberman.pdf
    • http://loaminoo.linkpc.net/1095092093091091/The-Husband-Tree-Montana-Marriages-2-by-Mary-Connealy.pdf
    • http://loaminoo.linkpc.net/3096090092094098/Miss-Polly-had-a-Dolly-Emma-Frost-2-by-Willow-Rose.pdf
    • http://loaminoo.linkpc.net/8094098091092092/The-Strange-and-Alarming-Courtship-of-Miss-Imogen-Roth-The-Baskerville-Affair-1-5-by-Emma-Jane-Holloway.pdf
    • http://loaminoo.linkpc.net/4094090097090092/The-Husband-Hunter-s-Guide-to-London-Husband-Hunters-1-by-Kate-Moore.pdf
    • http://loaminoo.linkpc.net/1099094095092092/Miss-Martha-Mary-Crawford-by-Catherine-Cookson.pdf
    • http://loaminoo.linkpc.net/1093095095090093/The-Vengeful-Husband-The-Husband-Hunters-2-by-Lynne-Graham.pdf
    • http://loaminoo.linkpc.net/9093091092090094/I-Now-Pronounce-You-Husband-and-Husband-Deny-amp-Arne-1-by-Van-Cole.pdf
    • http://loaminoo.linkpc.net/3091099097090090/Miss-Mary-Pennynickle-s-Fairytales-of-Foreboding-by-James-DeSalvo.pdf
    • http://loaminoo.linkpc.net/8094098091095092/The-Baskerville-Tales-Short-Stories-The-Adventure-of-the-Wollaston-Ritual-The-Strange-and-Alarming-Courtship-of-Miss-Imogen-Roth-The-Steamspinner-Mutiny-by-Emma-Jane-Holloway.pdf
    • http://loaminoo.linkpc.net/7097092097098090/The-Alpine-Recluse-Emma-Lord-18-by-Mary-Daheim.pdf
    • http://loaminoo.linkpc.net/4091091098097098/The-Alpine-Yeoman-Emma-Lord-25-by-Mary-Daheim.pdf
    • http://loaminoo.linkpc.net/3094091098099090/The-Alpine-Winter-Emma-Lord-23-by-Mary-Daheim.pdf

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