Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b93b40a8b790123…

MALICIOUS

PDF

19.3 KB Created: 2019-04-30 17:50:34 +01:00 Authoring application: mPDF 5.7
MD5: 3877afce87a2773a508398b67db786cb SHA-1: 0a2122bda4ac28a421b67cc645d164135919ae6f SHA-256: 5b93b40a8b790123ad69965060f3dfcf6a216e60f6dc24bf06b93d75ca0fcf8f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, forming a link farm. The heuristic PDF_SEO_LINK_FARM indicates this is a technique to generate SEO traffic or potentially distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/8091097091093093/Heart-of-Darkness-by-Joseph-Conrad-Illustrated-Heart-of-Darkness-1899-is-a-short-novel-by-Polish-novelist-Joseph-Conrad-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/6095091098099099/Heart-of-Darkness-Joseph-Conrad-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/2093094094096092/The-Heart-Of-Darkness-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/5098090094097094/The-Heart-of-Darkness-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/4092099091094096/Heart-of-Darkness-and-Other-Tales-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/8090095095098093/Heart-of-Darkness-Annotated-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/5099093092091095/Cuore-di-tenebra-Heart-of-Darkness-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/7097090090096095/Heart-of-Darkness-Vintage-Voyages-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/5098095093099096/Heart-of-Darkness-in-comprehensible-English-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/3091099098092094/Heart-of-Darkness-and-Selected-Short-Fiction-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/1090098093093091095/Heart-of-Darkness-Book-and-MP3-Pack-Level-5-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/5094091096095099/HEART-OF-DARKNESS-Introduction-by-Harold-Bloom-Annotated-and-Illustrated-by-Ken-Everett-With-Author-Biography-and-Bibliography-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/1090094097097097092/Heart-of-Darkness-British-Classics-Series-Including-Author-s-Memoirs-Letters-amp-Critical-Essays-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/6094095099096095/Heart-of-Darkness-Unabridged-Deluxe-Edition-An-Early-Modernist-Novel-From-the-Author-of-Nostromo-Lord-Jim-The-Secret-Agent-and-Under-Western-Eyes-Memoirs-Letters-amp-Critical-Essays-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/1090095096097093090/The-Joseph-Conrad-Collection-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/2092095097099095/The-Mirror-of-the-Sea-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/5095091098099/Nostromo-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/7095096090098098/Amy-Foster-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/5093093090095096/Nostromo-by-Joseph-Conrad.pdf
    • http://loaminoo.linkpc.net/3097091091093092/The-Duel-by-Joseph-Conrad.pdf

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