Malicious PDF — malware analysis report

Static analysis result for SHA-256 4098f5d58cad8961…

MALICIOUS

PDF

20.9 KB Created: 2019-05-05 16:09:34 +01:00 Authoring application: mPDF 5.7
MD5: a1111ae26a970783a7b64719de5ea5a5 SHA-1: 5af5405b23a939cdb3a1c43e63f21e37ae3d45b2 SHA-256: 4098f5d58cad89617cd12cf2801561705ac42c9cb7acddf949b88c015ab3611d
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests a lure to external content, potentially for SEO manipulation or to distribute further malware. The links themselves are to book titles, but the sheer volume and the heuristic firing suggest a malicious intent behind their inclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/9094099091091097/Iron-Fey-Series-Volume-1-The-Iron-King-Winter-s-Passage-The-Iron-Daughter-The-Iron-Queen-Summer-s-Crossing-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/3092098093092/The-Iron-Daughter-The-Iron-Fey-2-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/1093095092097091/The-Iron-Daughter-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/9094099091091095/Iron-King-4-The-Iron-Fey-Manga-4-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/3099098097090099/The-Iron-King-The-Iron-Fey-1-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/2099093096096097/The-Iron-King-The-Iron-Fey-1-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/3090092096097099/An-Iron-Fey-Valentine-The-Iron-Fey-4-4-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/4094092094097/Iron-s-Prophecy-The-Iron-Fey-4-5-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/2095098094093095/The-Iron-King-The-Iron-Fey-1-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/9094099091098095/The-Iron-Fey-Series-Julie-Kagawa-Collection-6-Books-Set-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/4098099093094092/The-Lost-Prince-The-Iron-Fey-Call-of-the-Forgotten-1-by-Julie-Kagawa.pdf
    • http://loaminoo.linkpc.net/8092092095092098/Iron-Rails-Iron-Men-and-the-Race-to-Link-the-Nation-The-Story-of-the-Transcontinental-Railroad-by-Martin-W-Sandler.pdf
    • http://loaminoo.linkpc.net/1097098098092095/Iron-amp-Wine-The-Iron-World-Series-1-by-Candace-Osmond.pdf
    • http://loaminoo.linkpc.net/6095095098092/The-Iron-Duke-Iron-Seas-1-by-Meljean-Brook.pdf
    • http://loaminoo.linkpc.net/2090094091092091/Eleanor-and-the-Iron-King-by-Julie-Daines.pdf
    • http://loaminoo.linkpc.net/1093093094092090/Age-of-Iron-Iron-Age-1-by-Angus-Watson.pdf
    • http://loaminoo.linkpc.net/5095093091094092/Erection-and-Inspection-of-Iron-and-Steel-Constructions-Written-for-the-Use-of-Architects-Engineers-and-Builders-and-for-Civil-Service-Candidates-for-the-Position-of-Inspector-of-Iron-and-Steel-by-L-M-Bernfeld.pdf
    • http://loaminoo.linkpc.net/5097099093097/The-Cast-Iron-Cookbook-30-Delicious-Breakfast-Lunch-and-Dinner-Recipes-You-Can-Cook-in-Your-Cast-Iron-Skillet-The-Essential-Kitchen-Series-Book-16-by-Sarah-Sophia.pdf
    • http://loaminoo.linkpc.net/2091098094099094/Hounded-Hexed-Hammered---The-Iron-Druid-Chronicles-Bundle-The-Iron-Druid-Chronicles-1-3-by-Kevin-Hearne.pdf
    • http://loaminoo.linkpc.net/7093099095/Heart-of-Iron-Heart-of-Iron-1-by-Ashley-Poston.pdf