Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a9903fc99a725e…

MALICIOUS

PDF

18.1 KB Created: 2019-11-07 15:01:08 +00:00 Authoring application: mPDF 5.7
MD5: a6576bb099c0030f8f8a9d8b0840d873 SHA-1: 8c551aaec76ffd46807c73ddb4c9f0208a516039 SHA-256: 85a9903fc99a725e3ca08483ab8d7158adbb658de0f4033c0ddeb06b6c774359
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which strongly suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. While the specific URLs themselves are currently flagged as benign, the sheer volume and the heuristic's critical severity indicate a suspicious pattern. The ML classifier also flagged the PDF as malicious with high confidence.

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/4737735736732732/Four-Star-Funerals-An-Anthology-About-Death-by-Ann-Barrington.pdf
    • http://cefasfese.4pu.com/1730735733731738/The-Oxymoron-of-Still-Life-Dying-Death-and-the-Sea-Anthology-by-Lynn-Lamb.pdf
    • http://cefasfese.4pu.com/4734737735735735/Saturday-Is-for-Funerals-by-Unity-Dow.pdf
    • http://cefasfese.4pu.com/3730732738733737/Funerals-Are-Fatal-Hercule-Poirot-29-by-Agatha-Christie.pdf
    • http://cefasfese.4pu.com/8736738736/Four-Funerals-and-Maybe-a-Wedding-Her-Royal-Spyness-Mystery-12-by-Rhys-Bowen.pdf
    • http://cefasfese.4pu.com/1731739733736731/A-Shooting-Star-Meets-the-Well-of-Death-Why-and-How-Richard-Halliburton-Conquered-the-World-by-William-R-Taylor.pdf
    • http://cefasfese.4pu.com/6735737739739/Star-by-Star-Star-Wars-The-New-Jedi-Order-9-by-Troy-Denning.pdf
    • http://cefasfese.4pu.com/5730731734732736/Boarding-the-Enterprise-Transporters-Tribbles-And-the-Vulcan-Death-Grip-in-Gene-Roddenberry-s-Star-Trek-by-David-Gerrold.pdf
    • http://cefasfese.4pu.com/4736738734731736/J-D-Robb-4-Book-Series-Collection-Gift-Set-Indulgence-In-Death-Hardcover-Fantasy-In-Death-Kindred-In-Death-Promises-In-Death-In-Death-Series-by-J-D-Robb.pdf
    • http://cefasfese.4pu.com/1739735730739731/Songs-of-Love-and-Death-All-Original-Tales-of-Star-Crossed-Love-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/1735732736732739/Songs-of-Love-and-Death-All-Original-Tales-of-Star-Crossed-Love-by-George-R-R-Martin.pdf
    • http://cefasfese.4pu.com/1733736735737739/The-Zen-Gun-by-Barrington-J-Bayley.pdf
    • http://cefasfese.4pu.com/2735732732730738/Anne-Boleyn-by-E-Barrington.pdf
    • http://cefasfese.4pu.com/7731739738739738/Collision-with-Chronos-by-Barrington-J-Bayley.pdf
    • http://cefasfese.4pu.com/2736737733735731/Sisters-and-Lies-by-Bernice-Barrington.pdf
    • http://cefasfese.4pu.com/1739731733732/Lifesaving-A-Memoir-by-Judith-Barrington.pdf
    • http://cefasfese.4pu.com/3734739735738738/Hot-Pursuit-Stone-Barrington-33-by-Stuart-Woods.pdf
    • http://cefasfese.4pu.com/2737739734739733/Below-the-Belt-Stone-Barrington-40-by-Stuart-Woods.pdf
    • http://cefasfese.4pu.com/6736732735732733/Through-the-Eyes-of-Vincent-Van-Gogh-by-Barrington-Barber.pdf
    • http://cefasfese.4pu.com/4737734739730736/Writing-the-Memoir-From-Truth-to-Art-by-Judith-Barrington.pdf

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