Malicious PDF — malware analysis report

Static analysis result for SHA-256 265a063ef783636d…

MALICIOUS

PDF

13.5 KB Created: 2019-05-02 01:21:55 +01:00 Authoring application: mPDF 5.7
MD5: e89dc3c6a1b3935fe9d56e03c667c188 SHA-1: 26d9e617811383f2fa98bdcaa3c26152ec74f004 SHA-256: 265a063ef783636d990dcc428ebc1a12275c8d8ae2b970fe17b0f0ffb8fe64c6
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. While the specific intent of the linked PDFs is unclear, the sheer volume and the nature of the heuristic firing suggest a malicious distribution or SEO poisoning attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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/1090094098093097095/Together-Alone-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/2092091093099097/Escape-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/1090096096094097093/More-Than-Friends-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/2092099092091090/Fast-Courting-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/5097093095094092/Bronze-Mystique-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/2091091092092099/Looking-for-Peyton-Place-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/3094093093093099/Variation-on-a-Theme-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/2092099096096090/A-Time-to-Love-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/3095093095098090/An-Accidental-Woman-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/6091098090099097/Warm-Hearts-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/2091097091096090/Finger-Prints-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/1096094098097097/While-My-Sister-Sleeps-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/6093092096091/Coast-Road-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/3095093095098098/The-Summer-I-Dared-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/8090092097092095/Santa-Barbara-Exotic-Flora-A-Handbook-of-Plants-from-Foreign-Countries-Grown-at-Santa-Barbara-California-1895-by-F-Franceschi.pdf
    • http://loaminoo.linkpc.net/3099096095096090/Everything-I-Know-About-You-by-Barbara-Dee.pdf
    • http://loaminoo.linkpc.net/1090096098092099/After-by-Barbara-Ehrentreu.pdf
    • http://loaminoo.linkpc.net/9099094099098098/With-or-Without-Him-by-Barbara-Elsborg.pdf
    • http://loaminoo.linkpc.net/2095095091092099/Just-the-Way-You-Are-by-Barbara-Freethy.pdf
    • http://loaminoo.linkpc.net/3095090098097096/Truly-Yours-by-Barbara-Metzger.pdf
    • http://loaminoo.linkpc.net/3095093095098098/The-Summer-I-Dared-by-Barbar

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