Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc2778b616503df8…

MALICIOUS

PDF

14.9 KB Created: 2019-04-29 23:00:37 +01:00 Authoring application: mPDF 5.7
MD5: a1cc969eb75597eb3372107c6d7ee79c SHA-1: 869995e606752ff893cfe847426e7f27ed0a0037 SHA-256: cc2778b616503df86c81193c3a4108b89398f0e140f60db6784997539be38133
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by a machine learning classifier as malicious and contains a large number of embedded external links. The heuristic 'PDF_SEO_LINK_FARM' indicates that these links are likely part of a scheme to manipulate search engine results or distribute malicious content. While the specific intent of the links is unclear due to their 'confirmed_benign' reputation, the sheer volume and the ML classification suggest a malicious purpose, possibly as a lure or a component of a larger attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9891

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/4092099095097094/The-Collected-Stories-of-Robert-Silverberg-Volume-1-Pluto-in-the-Morning-Light-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/4092099095096098/The-Collected-Stories-of-Robert-Silverberg-Volume-6-Multiples-1983-87-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/4092099095096095/The-Collected-Stories-Of-Robert-Silverberg-Volume-Five-The-Palace-At-Midnight-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/1096093095090097/To-Open-The-Sky-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/2097093093096/Chains-of-the-Sea-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/1092093098094090/Those-Who-Watch-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/3099098098098097/Nightwings-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/1096094090092090/The-Man-in-the-Maze-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/2097094098099/To-Jorslem-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/2097090097092098/Nightwings-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/6099096092099093/To-Live-Again-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/2097095090095/Hawksbill-Station-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/1096092092093098/Downward-to-the-Earth-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/2095090097096/Tower-of-Glass-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/2094099096092/The-Secret-Sharer-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/1093090097093092/The-Face-of-the-Waters-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/6099096093094090/The-Gate-of-Worlds-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/3097097094095090/The-Book-of-Skulls-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/6099096092099095/Star-of-Gypsies-by-Robert-Silverberg.pdf
    • http://loaminoo.linkpc.net/6095090099090091/Invaders-from-Earth-by-Robert-Silverberg.pdf

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