Malicious PDF — malware analysis report

Static analysis result for SHA-256 26cb0a429c2f35c0…

MALICIOUS

PDF

18.7 KB Created: 2019-06-04 19:05:52 +01:00 Authoring application: mPDF 5.7
MD5: 2dd92a582ab23761fededd5074cc2b9d SHA-1: b7f65dc9573ec37715adf30700d9d67581788d4d SHA-256: 26cb0a429c2f35c087e948521bb118fe77a30eb9f656bb7a412235896dc507dc
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, forming a link farm. The heuristic PDF_SEO_LINK_FARM indicates that 32 external PDF links were found, with 29 using a numeric slug format. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains many of these URLs, suggesting the primary intent is to redirect users to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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://cefasfese.4pu.com/2735734738732736/Iron-Afloat-The-Story-of-the-Confederate-Armorclads-by-William-N-Still-Jr-.pdf
    • http://cefasfese.4pu.com/6730731732730/The-Iron-Fey-Boxed-Set-The-Iron-King-The-Iron-Daughter-The-Iron-Queen-The-Iron-Knight-by-Julie-Kagawa.pdf
    • http://cefasfese.4pu.com/2735734736737734/Look-Away-A-History-of-the-Confederate-States-of-America-by-William-C-Davis.pdf
    • http://cefasfese.4pu.com/2735735734736731/Life-in-the-Confederate-Army-Being-the-Observations-and-Experiences-of-an-Alien-in-the-South-During-the-American-Civil-War-by-William-Watson.pdf
    • http://cefasfese.4pu.com/2735732733734733/Immortal-Iron-Fist-Vol-1-The-Last-Iron-Fist-Story-by-Ed-Brubaker.pdf
    • http://cefasfese.4pu.com/2731735736738737/Life-in-the-Confederate-Army-Being-Personal-Experiences-of-a-Private-Soldier-in-the-Confederate-Army-by-Arthur-Peronneau-Ford.pdf
    • http://cefasfese.4pu.com/1737732732733732/The-Iron-Giant-A-Story-in-Five-Nights-by-Ted-Hughes.pdf
    • http://cefasfese.4pu.com/4730738739739731/A-Schizophrenic-Will-A-Story-of-Madness-A-Story-of-Hope-by-William-Jiang.pdf
    • http://cefasfese.4pu.com/1738734734/The-Iron-Warrior-The-Iron-Fey-Call-of-the-Forgotten-3-by-Julie-Kagawa.pdf
    • http://cefasfese.4pu.com/3738732735738/The-Iron-Traitor-The-Iron-Fey-Call-of-the-Forgotten-2-by-Julie-Kagawa.pdf
    • http://cefasfese.4pu.com/1737732736730731/Iron-Bloom-Legend-of-the-Iron-Flower-1-by-Billy-Wong.pdf
    • http://cefasfese.4pu.com/4738733734735735/The-Iron-Traitor-The-Iron-Fey-Call-of-the-Forgotten-2-by-Julie-Kagawa.pdf
    • http://cefasfese.4pu.com/5731736731738/Iron-and-Blood-Iron-Kingdom-Saga-1-by-Brad-Farley.pdf
    • http://cefasfese.4pu.com/1733735731739731/The-Iron-Traitor-The-Iron-Fey-Call-of-the-Forgotten-2-by-Julie-Kagawa.pdf
    • http://cefasfese.4pu.com/2733733735732737/The-Iron-Duke-Iron-Seas-1-by-Meljean-Brook.pdf
    • http://cefasfese.4pu.com/1731739738734737739/Abraham-Lincoln-The-True-Story-of-a-Great-Life-Volumes-1-and-2-by-William-H-Herndon-And-Jesse-W-Weik-by-William-Henry-Herndon.pdf
    • http://cefasfese.4pu.com/1734732738739730/Afloat-by-Guy-de-Maupassant.pdf
    • http://cefasfese.4pu.com/2736736739734736/Afloat-by-Erin-Healy.pdf
    • http://cefasfese.4pu.com/1736737732730731/Afloat-by-Erin-Healy.pdf
    • http://cefasfese.4pu.com/1730736735739/The-Iron-King-The-Iron-Fey-1-by-Julie-Kagawa.pdf
    • http://cefasfese.4pu.com/2731735736738737/Life-in-the-Confederate-Army-Being-Personal-Experiences-of-a-Private-Soldier-in-the-Confederate-Army-by-Arthur-Peronnea

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