Malicious PDF — malware analysis report

Static analysis result for SHA-256 7861dbb88c307db5…

MALICIOUS

PDF

12.8 KB Created: 2019-05-07 06:19:48 +01:00 Authoring application: mPDF 5.7
MD5: 17bdb5d3c06f8b958b2190f794910da7 SHA-1: 6bd5626d2b184f2b1ec25b0b7c9fa3dccd4c478d SHA-256: 7861dbb88c307db5c320808b780eb7f6f0c4f1c3b1fe4d3a06d0a76bf15e89aa
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on xiixmcuin.linkpc.net. While the ML classifier also flagged this PDF as malicious, the specific intent appears to be link farming or potentially distributing further malicious content through these links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

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/1202205/Never-Smile-at-Strangers-Strangers-1-by-Jennifer-Jaynes.pdf
    • http://xiixmcuin.linkpc.net/2202201200203200/Never-Smile-at-Strangers-by-Jennifer-Jaynes.pdf
    • http://xiixmcuin.linkpc.net/5202206204203/The-Stranger-Inside-Strangers-4-by-Jennifer-Jaynes.pdf
    • http://xiixmcuin.linkpc.net/3205200209201208/Ugly-Young-Thing-Strangers-2-by-Jennifer-Jaynes.pdf
    • http://xiixmcuin.linkpc.net/4207201202204208/Smile-at-Strangers-And-Other-Lessons-in-the-Art-of-Living-Fearlessly-by-Susan-Schorn.pdf
    • http://xiixmcuin.linkpc.net/4203207203209208/The-Kindness-of-Strangers-Kindness-of-Strangers-2003-by-Don-George.pdf
    • http://xiixmcuin.linkpc.net/6208206201/Disturbed-by-Jennifer-Jaynes.pdf
    • http://xiixmcuin.linkpc.net/8208205205202207/Verh-ngnisvolles-L-cheln-by-Jennifer-Jaynes.pdf
    • http://xiixmcuin.linkpc.net/4203200206204208/Trusting-Strangers-by-D-A-Roach.pdf
    • http://xiixmcuin.linkpc.net/3209201204202204/Strangers-by-Barbara-Elsborg.pdf
    • http://xiixmcuin.linkpc.net/1200201204205202/Strangers-by-Taichi-Yamada.pdf
    • http://xiixmcuin.linkpc.net/1204202201/Before-We-Were-Strangers-by-Renee-Carlino.pdf
    • http://xiixmcuin.linkpc.net/1200203201201201/When-We-Were-Strangers-by-Pamela-Schoenewaldt.pdf
    • http://xiixmcuin.linkpc.net/2206203208208/Strangers-by-Dean-Koontz.pdf
    • http://xiixmcuin.linkpc.net/7206204205209208/Before-We-Were-Strangers-by-Nadya-Aisenberg.pdf
    • http://xiixmcuin.linkpc.net/1204200205206205/Between-Strangers-by-Linda-Conrad.pdf
    • http://xiixmcuin.linkpc.net/8205205209205202/Relative-Strangers-by-S-M-Mala.pdf
    • http://xiixmcuin.linkpc.net/9203207204/Before-We-Were-Strangers-by-Brenda-Novak.pdf
    • http://xiixmcuin.linkpc.net/1201205205202207207/Before-We-Were-Strangers-by-Brenda-Novak.pdf
    • http://xiixmcuin.linkpc.net/8208202202200/Strangers-by-Anita-Brookner.pdf
    • http://xiixmcuin.linkpc.net/220

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