Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fa13b486ffc123…

MALICIOUS

PDF

18.1 KB Created: 2019-04-30 08:16:34 +01:00 Authoring application: mPDF 5.7
MD5: ab6904920036747dd7616c02873105a1 SHA-1: 0d49944ed7380bdc9de0c7bf8c3e0120393a37f6 SHA-256: c8fa13b486ffc123b9167ce558ff7d28c9346a73715466974dce515e401d5808
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. While most of these links point to benign-looking book titles, the sheer volume and the ML classifier's high confidence score suggest a malicious intent, possibly for SEO poisoning or to redirect users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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://muicuiu.dumb1.com/2a06a06a00a03/In-the-Country-of-the-Blind-by-Michael-F-Flynn.pdf
    • http://muicuiu.dumb1.com/3a03a01a04a04a07/In-the-Country-of-the-Blind-by-Michael-F-Flynn.pdf
    • http://muicuiu.dumb1.com/7a08a06a08a03/Up-Jim-River-Spiral-Arm-2-by-Michael-F-Flynn.pdf
    • http://muicuiu.dumb1.com/1a01a04a09a06a02/Blind-Veil-by-Michael-Lorde.pdf
    • http://muicuiu.dumb1.com/3a08a03a05a08a02/The-Field-of-Fight-How-We-Can-Win-the-Global-War-Against-Radical-Islam-and-Its-Allies-by-Michael-T-Flynn.pdf
    • http://muicuiu.dumb1.com/4a03a03a09a07/The-Blind-Side-Evolution-of-a-Game-by-Michael-Lewis.pdf
    • http://muicuiu.dumb1.com/4a07a01a09a06a08/The-Blind-Side-Evolution-of-a-Game-by-Michael-Lewis.pdf
    • http://muicuiu.dumb1.com/9a02a04a02a08/The-Blind-Side-Evolution-of-a-Game-by-Michael-Lewis.pdf
    • http://muicuiu.dumb1.com/1a00a07a04a05a05a09/Blind-Instinct-Tess-Barrett-2-by-Michael-W-Sherer.pdf
    • http://muicuiu.dumb1.com/4a07a05a03a01a03/Country-Doctor-Tales-of-a-Rural-GP-Michael-Sparrow-by-Michael-Sparrow.pdf
    • http://muicuiu.dumb1.com/2a09a00a04a01/Deaf-Dumb-Blind-amp-Stupid-Michael-Anderson-s-Fight-For-Life-by-Tremayne-Moore.pdf
    • http://muicuiu.dumb1.com/4a02a03a05a00a02/Thunder-Dog-The-True-Story-of-a-Blind-Man-His-Guide-Dog-and-the-Triumph-of-Trust-at-Ground-Zero-by-Michael-Hingson.pdf
    • http://muicuiu.dumb1.com/6a01a06a00a03/Thunder-Dog-The-True-Story-of-a-Blind-Man-His-Guide-Dog-and-the-Triumph-of-Trust-at-Ground-Zero-by-Michael-Hingson.pdf
    • http://muicuiu.dumb1.com/1a08a09a03a03a05/Dude-Where-s-My-Country-by-Michael-Moore.pdf
    • http://muicuiu.dumb1.com/1a04a03a06a05a03/Dude-Where-s-My-Country-by-Michael-Moore.pdf
    • http://muicuiu.dumb1.com/1a08a08a04a06a04/Blind-Descent-Surviving-Alone-and-Blind-on-Mount-Everest-by-Brian-Dickinson.pdf
    • http://muicuiu.dumb1.com/3a05a07a05a09a04/Vince-Flynn-Collectors-Edition-1-Term-Limits-Transfer-of-Power-and-The-Third-Option-by-Vince-Flynn.pdf
    • http://muicuiu.dumb1.com/3a04a02a05a04a02/Scenes-from-the-Country-Fair-by-Michael-P-Gadomski.pdf
    • http://muicuiu.dumb1.com/1a08a07a02a06/Black-Bear-Country-by-Michael-Furtman.pdf
    • http://muicuiu.dumb1.com/9a00a09a03a04a01/The-Complete-Gillian-Flynn-Gone-Girl-Dark-Places-Sharp-Objects-by-Gillian-Flynn.pdf
    • http://muicuiu.dumb1.com/4a07a05a03a01a03/Country-Doctor-Tal

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