Malicious PDF — malware analysis report

Static analysis result for SHA-256 45609b6f546f0463…

MALICIOUS

PDF

15.3 KB Created: 2019-04-30 04:35:56 +01:00 Authoring application: mPDF 5.7
MD5: d8c1bcc8e353464dbce061aa8acd728e SHA-1: 3185b01817974d534d3b6b5b2327cab8de6d937c SHA-256: 45609b6f546f0463bcc57020cb4d33a111615fa98bcd64e30937001a30ba887d
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDFs, hosted on the dynamic DNS domain xiixmcuin.linkpc.net. This behavior is indicative of a link farm or SEO poisoning attack, designed to drive traffic to specific content. While the ML classifier flagged this as malicious with high confidence, the specific intent beyond link distribution is unclear due to the lack of executable scripts or obfuscated document body content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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/2205201205204208/Grant-s-Final-Victory-Ulysses-S-Grant-s-Heroic-Last-Year-by-Charles-Bracelen-Flood.pdf
    • http://xiixmcuin.linkpc.net/6209205209207205/Reminiscences-of-Ulysses-S-Grant-by-Ulysses-S-Grant.pdf
    • http://xiixmcuin.linkpc.net/2205204206209201/Ulysses-S-Grant-The-Unlikely-Hero-by-Michael-Korda.pdf
    • http://xiixmcuin.linkpc.net/4204208205200/The-Man-Who-Saved-the-Union-Ulysses-Grant-in-War-and-Peace-by-H-W-Brands.pdf
    • http://xiixmcuin.linkpc.net/4201207204201/Blood-Stories-of-Life-and-Death-from-the-Civil-War-by-Ulysses-S-Grant.pdf
    • http://xiixmcuin.linkpc.net/2205204208200202/Whip-the-Rebellion-Ulysses-S-Grant-s-Rise-to-Command-by-George-Walsh.pdf
    • http://xiixmcuin.linkpc.net/2205204208204209/Ulysses-S-Grant-Triumph-over-Adversity-1822-1865-by-Zenith-Press.pdf
    • http://xiixmcuin.linkpc.net/2203208208201/Seven-Soldiers-of-Victory-Volume-3-by-Grant-Morrison.pdf
    • http://xiixmcuin.linkpc.net/2205205202204204/The-Web-of-Victory-Grant-at-Vicksburg-by-Earl-S-Miers.pdf
    • http://xiixmcuin.linkpc.net/8208204207209/Final-Crisis-by-Grant-Morrison.pdf
    • http://xiixmcuin.linkpc.net/1203208201208205/The-Mask-of-Command-Alexander-the-Great-Wellington-Ulysses-S-Grant-Hitler-and-the-Nature-of-Leadership-by-John-Keegan.pdf
    • http://xiixmcuin.linkpc.net/2209205208209201/Good-Stuff-A-Reminiscence-of-My-Father-Cary-Grant-by-Jennifer-Grant.pdf
    • http://xiixmcuin.linkpc.net/2206203207204/The-Pet-by-Charles-L-Grant.pdf
    • http://xiixmcuin.linkpc.net/2206204204204/Nightmares-by-Charles-L-Grant.pdf
    • http://xiixmcuin.linkpc.net/1209205201206207/The-X-Files-Whirlwind-by-Charles-L-Grant.pdf
    • http://xiixmcuin.linkpc.net/6206209206206202/The-Battle-of-Fontenoy-by-Charles-Grant.pdf
    • http://xiixmcuin.linkpc.net/2206204205207/Sound-of-Midnight-by-Charles-L-Grant.pdf
    • http://xiixmcuin.linkpc.net/2205209204203/Nightmare-Seasons-by-Charles-L-Grant.pdf
    • http://xiixmcuin.linkpc.net/2206204204209/The-Last-Call-of-Mourning-by-Charles-L-Grant.pdf
    • http://xiixmcuin.linkpc.net/1200209204202203204/The-First-Chronicles-of-Greystone-Bay-by-Charles-L-Grant.pdf

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