Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa61da3291fdc0a…

MALICIOUS

PDF

18.1 KB Created: 2019-04-30 03:39:13 +01:00 Authoring application: mPDF 5.7
MD5: 23300d6995ec1ce54aec9f547094cc99 SHA-1: 360309de6ac5f2f65e2c11a28316a911350cc19a SHA-256: dfa61da3291fdc0acc23b844b8e074e808455db26d53515cc729453bf42111af
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While most of these URLs resolve to benign content, the sheer volume and structure suggest a malicious intent, possibly for SEO manipulation or to serve as a distribution point for further malware. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific payload.

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/5a02a06a03a07a00/Dogs-by-Rien-Poortvliet.pdf
    • http://muicuiu.dumb1.com/5a02a06a03a08a09/A-Gnome-s-Christmas-by-Rien-Poortvliet.pdf
    • http://muicuiu.dumb1.com/5a02a06a03a06a04/The-Book-of-the-Sandman-and-the-Alphabet-of-Sleep-by-Rien-Poortvliet.pdf
    • http://muicuiu.dumb1.com/2a05a07a08a00a07/Daily-Life-in-Holland-in-the-Year-1566-by-Rien-Poortvliet.pdf
    • http://muicuiu.dumb1.com/5a09a03a06a09a03/Rien-qu-un-soupir-by-Stacey-Lynn.pdf
    • http://muicuiu.dumb1.com/5a08a06a04a05a04/Rien-ne-finit-by-Emmanuel-Moses.pdf
    • http://muicuiu.dumb1.com/5a02a06a03a07a07/Rien-qu-avec-toi-by-Renee-Carlino.pdf
    • http://muicuiu.dumb1.com/2a03a00a07a07a06/The-Element-of-Fire-Ile-Rien-1-by-Martha-Wells.pdf
    • http://muicuiu.dumb1.com/1a07a02a07a09a03/The-Element-of-Fire-Ile-Rien-1-by-Martha-Wells.pdf
    • http://muicuiu.dumb1.com/7a03a04a01a08a01/Rien-N-Est-Plus-Pareil-Et-CA-N-Est-Pas-Un-Drame-by-Gerard-Demuth.pdf
    • http://muicuiu.dumb1.com/1a01a01a04a02a06a07/Tu-ne-diras-jamais-rien-by-Pola-Kinski.pdf
    • http://muicuiu.dumb1.com/5a07a02a07a03a03/C-est-dimanche-et-je-n-y-suis-pour-rien-by-Carole-Fives.pdf
    • http://muicuiu.dumb1.com/8a09a01a03a08/The-Wizard-Hunters-The-Fall-of-Ile-Rien-1-by-Martha-Wells.pdf
    • http://muicuiu.dumb1.com/2a01a06a01a03a05/The-Gate-of-Gods-Fall-of-Ile-Rien-3-by-Martha-Wells.pdf
    • http://muicuiu.dumb1.com/1a01a01a04a08a01a08/Heathlands-Patterns-and-Processes-in-a-Changing-Environment-by-Rien-Aerts.pdf
    • http://muicuiu.dumb1.com/5a02a06a03a06a01/La-Princesse-qui-n-avait-plus-rien-The-Books-of-Bayern-1-by-Shannon-Hale.pdf
    • http://muicuiu.dumb1.com/7a06a06a02a09a00/Ne-Craignez-Rien-Docteur-Je-Ne-Vous-Ferai-Aucun-Mal-by-Didier-Weil.pdf
    • http://muicuiu.dumb1.com/5a08a05a03a01a04/Le-djihad-expliqu-ceux-qui-n-y-comprennent-rien-ou-presque-by-Collectif-d-39-auteurs-ind-pendants-pour-la-paix-et-la-tol-rance.pdf
    • http://muicuiu.dumb1.com/5a04a08a09a08a06/Rien-ne-s-oppose-la-nuit-de-Delphine-de-Vigan-Fiche-de-lecture-R-sum-complet-et-analyse-d-taill-e-de-l-oeuvre-by-Elena-Pinaud.pdf
    • http://muicuiu.dumb1.com/7a06a08a09a08a00/Mini-C-Est-Pour-Rire-7-On-S-Eclate-a-la-Recre-Des-Gags-Super-Rigolos-Rien-Que-Pour-Les-Enfants-by-Claude-Mocchi.pdf
    • http://muicuiu.dumb1.com/8a09a01a03a08/The-Wizard-Hunters-The-Fall-of-Ile-Rien-1-by-Martha-We

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