Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fafa93043ca081…

MALICIOUS

PDF

24.9 KB Created: 2019-04-30 05:27:03 +01:00 Authoring application: mPDF 5.7
MD5: 5ea3d84006e5b2b4cbaf1711c9aa08e6 SHA-1: e317007775b3293a76391a121b03fab78af9490b SHA-256: c8fafa93043ca081923ed737d4b313caa1b4e5f19b7302b217806919bb433682
90 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and contains a large number of embedded links to external PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates that the document is part of a link farm, with 30 external links detected, 27 of which are in a coded directory book slug format. While the document body is heavily obfuscated, the presence of numerous links suggests a malicious intent, possibly for SEO manipulation or to redirect users to malicious content hosted on the linked domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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/9a08a05a01a09a00/Great-Expectations-by-Charles-Dickens-Illustrated-Delphi-Parts-Edition-Charles-Dickens-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/6a03a00a01a04a02/A-Novel-Journal-Great-Expectations-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/8a03a09a06a07a04/Great-Expectations-with-Connections-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/7a01a05a04a09a08/Great-Expectations-English-amp-Chinese-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/9a05a09a00a05a06/Great-Expectations-And-Related-Readings-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/6a06a09a03a04a08/Great-Expectations-Color-Illustrated-Formatted-for-E-Readers-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/5a04a08a09a06a02/Great-Expectations-Illustrated-with-Critical-Thinking-Discussion-Questions-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/7a04a05a00a05a09/Great-Expectations-Centaur-Classics-The-100-greatest-novels-of-all-time---16-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/5a09a01a07a09a09/Bleak-House-1852-by-Charles-Dickens-The-Ninth-Novel-by-Charles-Dickens-World-s-Classic-s-Bleak-House-Is-One-of-Charles-Dickens-s-Major-Novels-First-Published-as-a-Serial-Between-March-1852-and-September-1853-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/1a01a05a04a04a03a08/OLIVER-TWIST-by-Charles-Dickens-Original-Illustrations-and-Annotated-with-Free-Audiobook-Link-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/5a07a07a00a03a05/Charles-Dickens-Oliver-Twist-Complete-Original-And-Unabridged-Authoritative-Text-With-Selected-Criticism-And-Background-Notes-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/7a09a08a02a06a02/Les-romans-de-Charles-Dickens-Le-Grillon-du-Foyer---Histoire-Fantastique-d-un-Int-rieur-Domestique-et-Aventures-de-Monsieur-Pickwick-Tome-I-et-II-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/5a09a03a04a04a06/Oliver-Twist-By-Charles-Dickens---Illustrated-Comes-with-a-Free-Audiobook-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/1a00a07a05a01a08a05/Charles-Dickens-A-Christmas-Carol-A-Radio-Dramatization-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/9a08a03a04a00a01/Charles-Dickens-A-Christmas-Carol-A-Radio-Dramatization-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/8a02a08a05a05a05/The-Letters-of-Charles-Dickens-Vol-2-1857-1870-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/5a08a08a00a01a00/Oliver-Twist-By-Charles-Dickens---Illustrated-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/1a00a08a03a02a02a01/David-Copperfield-By-Charles-Dickens-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/5a08a09a06a02/Little-Paul-From-the-Dombey-and-Son-of-Charles-Dickens-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/8a00a05a04a04a02/A-Christmas-Carol-Victorian-Carols-with-Readings-from-Dickens-by-Charles-Dickens.pdf
    • http://muicuiu.dumb1.com/9a05a09a00a05a06/G

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