Malicious PDF — malware analysis report

Static analysis result for SHA-256 641f59987e2b8b7e…

MALICIOUS

PDF

13.8 KB Created: 2020-03-20 17:14:11 +00:00 Authoring application: mPDF 5.7
MD5: deeacecc6e1611b3b3edd342efc813d9 SHA-1: f7f2ec342aed02087338a40c9e6f3bc571b6f8d9 SHA-256: 641f59987e2b8b7e1868faa5ff272247bb58126c5cbb0369848bc71f51709634
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains a large number of embedded URLs pointing to external PDF files. The heuristic 'PDF_SEO_LINK_FARM' indicates this is likely an attempt to manipulate search engine results or distribute content. The ML classifier also flagged the document as malicious. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific intent beyond linking to external resources.

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://weisncio.myhome.cx/4621625629627/The-Immortal-Hunter-Argeneau-11-Rogue-Hunter-2-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/4623629622626627/The-Immortal-Hunter-Argeneau-11-Rogue-Hunter-2-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/2628625623621625/The-Renegade-Hunter-Argeneau-12-Rogue-Hunter-3-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/3629629626628/Immortal-Ever-After-Argeneau-18-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/4620629626/Immortal-Nights-Argeneau-24-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/1629620621627627/Immortal-Unchained-Argeneau-25-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/5620625627620627/Immortal-Nights-Argeneau-24-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/2620627627621628/About-a-Vampire-Argeneau-22-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/2621624623621626/About-a-Vampire-Argeneau-22-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/4622628626620620/About-a-Vampire-Argeneau-22-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/3629629625625/Vampires-are-Forever-Argeneau-8-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/5624623627624623/Runaway-Vampire-An-Argeneau-Novel-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/3627625625622/The-Accidental-Vampire-Argeneau-7-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/2626620621620624/Vampire-Interrupted-Argeneau-9-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/2627620622/Runaway-Vampire-Argeneau-23-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/4628620622624/Under-a-Vampire-Moon-Argeneau-16-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/3629620629624/Love-Bites-Argeneau-2-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/4627622627620/The-Lady-is-a-Vamp-Argeneau-17-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/3623626627629624/A-Bite-to-Remember-Argeneau-5-by-Lynsay-Sands.pdf
    • http://weisncio.myhome.cx/3625626629626622/The-Vampire-Collection-Argeneau-1-6-by-Lynsay-Sands.pdf