Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05673bbc3c63d7b…

MALICIOUS

PDF

15.1 KB Created: 2019-04-30 04:10:43 +01:00 Authoring application: mPDF 5.7
MD5: afa299ea86380c529cbe005b8fa1d4fb SHA-1: 7be0d4b970e2e6bfd06605493b89d4a9caccecba SHA-256: c05673bbc3c63d7b0a009094e35bc244f79e82480eec84c74756bfc3a436cea8
90 Risk Score

Malware Insights

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

The PDF file exhibits a critical heuristic firing for a link farm, containing numerous embedded URLs. While the ML classifier strongly indicates maliciousness, the specific intent beyond link distribution is unclear due to the lack of executable scripts or clear malicious document body content. The primary attack pattern observed is the mass embedding of external links, likely for SEO manipulation or to serve as a distribution point for further malicious content.

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://xiixmcuin.linkpc.net/3207204208204204/It-Doesn-t-Exist-Mythical-Stories-by-Corinne-Mucha.pdf
    • http://xiixmcuin.linkpc.net/3207204204204207/Get-Over-It-by-Corinne-Mucha.pdf
    • http://xiixmcuin.linkpc.net/3207204204204209/My-Alaskan-Summer-by-Corinne-Mucha.pdf
    • http://xiixmcuin.linkpc.net/8208209207204200/The-Christian-Atheist-Believing-in-God-but-Living-as-if-He-Doesn-t-Exist-by-Craig-Groeschel.pdf
    • http://xiixmcuin.linkpc.net/7206207204/What-He-Doesn-t-Know-What-He-Doesn-t-Know-Duet-1-by-Kandi-Steiner.pdf
    • http://xiixmcuin.linkpc.net/4202203205206/What-My-Mother-Doesn-t-Know-What-My-Mother-Doesn-t-Know-1-by-Sonya-Sones.pdf
    • http://xiixmcuin.linkpc.net/1201200209203205204/Mythical-Detective-Loki-Vol-04-by-Sakura-Kinoshita.pdf
    • http://xiixmcuin.linkpc.net/8202200207200202/The-Book-of-Dragons-and-Other-Mythical-Beasts-by-Joseph-Nigg.pdf
    • http://xiixmcuin.linkpc.net/2208209206207209/The-Case-of-the-Mythical-Monkeys-by-Erle-Stanley-Gardner.pdf
    • http://xiixmcuin.linkpc.net/8208204201202201/Alfons-Mucha-by-Josef-Moucha.pdf
    • http://xiixmcuin.linkpc.net/6200206201208201/Alphonse-Mucha-by-Tomoko-Sato.pdf
    • http://xiixmcuin.linkpc.net/1201202203200201201/The-Orbis-Philatelic-Atlas-by-Ludvic-Mucha.pdf
    • http://xiixmcuin.linkpc.net/6200206201208205/Alphonse-Mucha-An-American-Collection-by-Don-Kurtz.pdf
    • http://xiixmcuin.linkpc.net/3202204203201201/God-Does-Not-Exist-by-Joseph-C-Hirl.pdf
    • http://xiixmcuin.linkpc.net/7207200202204200/Mythical-Trickster-Figures-Contours-Contexts-and-Criticisms-by-William-J-Hynes.pdf
    • http://xiixmcuin.linkpc.net/6200206203202206/Alphonse-Mucha-Collections-170-Reproductions-by-Denise-Ankele.pdf
    • http://xiixmcuin.linkpc.net/4201205206207205/What-if-Blacks-Did-Not-Exist-by-Felix-T-Ehui.pdf
    • http://xiixmcuin.linkpc.net/6202207207203207/This-Book-Does-Not-Exist-by-Mike-Schneider.pdf
    • http://xiixmcuin.linkpc.net/9209207209204/The-Temptation-to-Exist-by-Emil-M-Cioran.pdf
    • http://xiixmcuin.linkpc.net/2209207205207209/Biblioclasm-The-Mythical-Origins-Magic-Powers-and-Perishability-of-the-Written-Word-by-Marc-Drogin.pdf
    • http://xiixmcuin.linkpc.net/6200206201208201/Alphonse-Mucha-by-Tomoko-Sat

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