Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9c1b929df2cf07…

MALICIOUS

PDF

18.1 KB Created: 2019-05-02 00:43:51 +01:00 Authoring application: mPDF 5.7
MD5: c1aea9b6ecc6bc3f4a93852087ddb491 SHA-1: 09d1b7cf95b442924252b723601c78b5c9682dda SHA-256: cb9c1b929df2cf07da82d2be9171ffc170942b3f9512244c2f51508a37a2ddd2
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, forming a link farm, with the dominant host being xiixmcuin.linkpc.net. While the URLs themselves are currently marked as benign, the sheer volume and nature of the links suggest a malicious intent, possibly for SEO poisoning or distributing further malicious content. No scripts were extracted from this sample.

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://xiixmcuin.linkpc.net/4207201209209/The-Minority-Report-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/2204200203204201/Minority-Report-Volume-Four-Of-The-Collected-Stories-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/1205204209202200/The-Collected-Works-of-Philip-K-Dick-11-Science-Fiction-Stories-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/1203208207205205/The-Collected-Stories-of-Philip-K-Dick-2-We-Can-Remember-it-for-You-Wholesale-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/3202208204209205/The-Short-Happy-Life-of-the-Brown-Oxford-and-Other-Classic-Stories-The-Collected-Stories-of-Philip-K-Dick-Vol-1-Vol-1-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/4202209207204205/The-Collected-Stories-of-Philip-K-Dick-5-Vols-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/5206207209201203/Philip-K-Dick-s-Electric-Dreams-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/5204208205209/SPECIAL-EXTENSIVE-EDITION-of-The-Senate-Intelligence-Committee-Report-on-Torture-Including-Additional-Views-Minority-Views-amp-Additional-Minority-Views-Standard-Reflowable-Flexible-Ebook-Edition-by-Senate-Select-Committee-on-Intelligence.pdf
    • http://xiixmcuin.linkpc.net/1201201206206204209/The-Philip-K-Dick-Collection-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/1207205203205201/The-Zap-Gun-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/1201204209205202/Eye-in-the-Sky-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/1203208205201209/The-Simulacra-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/3202206209206206/The-Eyes-Have-It-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/1201203207200209208/The-Defenders-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/3202204206208204/Ubik-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/8207202202206209/Oh-to-Be-A-Blobel-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/4206208207205207/VALIS-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/8203207201208202/The-Variable-Man-and-Other-Stories-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/4203204206202/Time-Out-of-Joint-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/3203200204204/A-Scanner-Darkly-by-Philip-K-Dick.pdf
    • http://xiixmcuin.linkpc.net/5206207209201203/

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