Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b1f08911716651…

MALICIOUS

PDF

16.8 KB Created: 2019-05-03 09:18:08 +01:00 Authoring application: mPDF 5.7
MD5: 1c1674faa117ffd77a503a59920bf389 SHA-1: 2672ef81e8edf0ef9a4200528e65b3056faed3f7 SHA-256: 46b1f089117166514da1467eef2d0468c54af416d0312a132c806417aaf63b8f
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 pointing to a single domain, `cefasfese.4pu.com`, which is indicative of a link farm or SEO poisoning attack. The heuristic `PDF_SEO_LINK_FARM` confirms this, noting 32 external PDF links. While the document body is heavily corrupted, the presence of numerous links suggests the primary intent is to redirect users to potentially malicious content hosted on the identified domain. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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/1730738732734734733/Microsoft-Excel-Made-Easy-Carol-Elston-Rob-Hawkins-amp-Sue-Orrell-by-Carol-Elston.pdf
    • http://cefasfese.4pu.com/1730738732738730731/Children-of-Sacred-Ground-America-s-Last-Indian-War-by-Catherine-Feher-Elston.pdf
    • http://cefasfese.4pu.com/1730738732737739733/Which-Way-To-Get-An-Elife-by-Carol-Elston.pdf
    • http://cefasfese.4pu.com/9733732731/The-Lying-Woods-by-Ashley-Elston.pdf
    • http://cefasfese.4pu.com/1730738732736733733/The-Evolution-of-Hockey-by-Dave-Elston.pdf
    • http://cefasfese.4pu.com/1730738732736732739/The-Man-Who-Ruined-Football-by-Elston-Brooks.pdf
    • http://cefasfese.4pu.com/1730738732734733737/Ravensong-by-Catherine-Feher-Elston.pdf
    • http://cefasfese.4pu.com/1730738732738730732/Hit-the-Saddle-by-Allan-Vaughan-Elston.pdf
    • http://cefasfese.4pu.com/1730738732737732737/Don-t-dry-clean-my-blackjack-by-Elston-Brooks.pdf
    • http://cefasfese.4pu.com/1730738732737732732/Off-the-Beaten-Track-in-Southern-France-by-Roy-Elston.pdf
    • http://cefasfese.4pu.com/1730738732738730739/Snakes-Eat-and-Grow-Level-2-by-Heidi-M-D-Elston.pdf
    • http://cefasfese.4pu.com/1730738732738731730/Snakes-in-the-Desert-Level-3-by-Heidi-M-D-Elston.pdf
    • http://cefasfese.4pu.com/1730738732734733735/Elston-and-Me-The-Story-of-the-First-Black-Yankee-by-Arlene-Howard.pdf
    • http://cefasfese.4pu.com/1730738732737734734/5-Children-s-Stories-Teaching-Virtuous-Principles-by-Diane-Elston.pdf
    • http://cefasfese.4pu.com/1730738732737735733/Health-Management-Development-and-Histology-of-Seed-Oysters-by-R-A-Elston.pdf
    • http://cefasfese.4pu.com/1730738732735731733/Calvin-Coolidge-30th-President-of-the-United-States-by-Heidi-Elston.pdf
    • http://cefasfese.4pu.com/1730738732737731737/Millard-Fillmore-13th-President-of-the-United-States-by-Heidi-Elston.pdf
    • http://cefasfese.4pu.com/1730738732737735732/What-is-Arnica-Why-Arnica-Montana-is-the-1-Best-Selling-Homeopathic-Remedy-in-the-World-by-Ruth-Elston.pdf
    • http://cefasfese.4pu.com/1730738732737735730/The-Teachers-Guide-to-NLP-A-Guide-to-Effective-Use-of-NLP-in-the-Classroom-by-Terry-Elston.pdf
    • http://cefasfese.4pu.com/3730735731735731/The-Rules-for-Breaking-The-Rules-for-Disappearing-2-by-Ashley-Elston.pdf

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