Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8720d29bf45ec4…

MALICIOUS

PDF

14.8 KB Created: 2019-04-30 03:30:33 +01:00 Authoring application: mPDF 5.7
MD5: c90812aa84c2adf9e9fd17e3fe22ce34 SHA-1: b340ff705ac89dbd20dad550c2a4ece8561ccd06 SHA-256: 4a8720d29bf45ec4eff86e8f8f4844bb2a1e4e9868efe976fb6cb07f3c504594
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, identified as a PDF SEO link farm, pointing to book download sites. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern involves luring users to these external sites, likely to distribute further malware or engage in other malicious activities under the guise of providing free book downloads.

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://loaminoo.linkpc.net/5090095097095099/Red-Rising-Red-Rising-Trilogy-1-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/6099097090097/Morning-Star-Red-Rising-Trilogy-3-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/6/Golden-Son-Red-Rising-2-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/2094094098097093/Golden-Son-Red-Rising-2-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/4098094094096090/Dark-Age-Red-Rising-Saga-5-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/9091094092/Iron-Gold-Red-Rising-Saga-4-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/2092092092090099/Iron-Gold-Red-Rising-Saga-4-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/4096091094098093/Iron-Gold-Red-Rising-Saga-4-by-Pierce-Brown.pdf
    • http://loaminoo.linkpc.net/3091099090092093/Darkness-Rising-Complete-Trilogy-Collection-The-Gathering-The-Calling-The-Rising-by-Kelley-Armstrong.pdf
    • http://loaminoo.linkpc.net/4099091097091097/Temperatures-Rising-by-Sandra-Brown.pdf
    • http://loaminoo.linkpc.net/9098096093/Rising-Strong-by-Bren-Brown.pdf
    • http://loaminoo.linkpc.net/2092092092098098/Rising-Up-and-Rising-Down-by-William-T-Vollmann.pdf
    • http://loaminoo.linkpc.net/3097097091093/The-Rising-The-Rising-1-by-Brian-Keene.pdf
    • http://loaminoo.linkpc.net/4093099091096092/A-MORE-PERFECT-UNION-SUPREMACY-RISING-Book-II-by-Holly-Brown.pdf
    • http://loaminoo.linkpc.net/4090093090092/Black-Sun-Rising-The-Coldfire-Trilogy-1-by-C-S-Friedman.pdf
    • http://loaminoo.linkpc.net/2097090098096094/Black-Sun-Rising-The-Coldfire-Trilogy-1-by-C-S-Friedman.pdf
    • http://loaminoo.linkpc.net/1092099094097094/Midnight-Rising-John-Brown-and-the-Raid-That-Sparked-the-Civil-War-by-Tony-Horwitz.pdf
    • http://loaminoo.linkpc.net/1095090094099094/After-The-Rising-A-Novel-An-Irish-Trilogy-Book-1-by-Orna-Ross.pdf
    • http://loaminoo.linkpc.net/6093097091090/New-Moon-Rising-St-Simons-Trilogy-2-by-Eugenia-Price.pdf
    • http://loaminoo.linkpc.net/6097096095094094/Phobos-Rising-Ephialtes-Trilogy-2-by-Gavin-E-Parker.pdf
    • http://loaminoo.linkpc.net/209209209

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