Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1e52fc83ab9735…

MALICIOUS

PDF

13.9 KB Created: 2019-11-09 22:07:54 +00:00 Authoring application: mPDF 5.7
MD5: dc0ec1b63a009f425b67cae9035cf091 SHA-1: 8f6e4883df30512f2490ad12462466f0d51a2daa SHA-256: 1d1e52fc83ab9735354ea11e436ba75e05dbf2c4d6f122107b827ae9571d7793
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded URLs, forming a link farm. The dominant host for these links is 'cefasfese.4pu.com'. While the extracted URLs themselves are currently marked as benign, the sheer volume and structure suggest a malicious intent, likely to redirect users to harmful content or phishing pages. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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.4
    • http://cefasfese.4pu.com/4731738734731731/Blind-Tasting-The-Love-List-3-by-Angela-Ford.pdf
    • http://cefasfese.4pu.com/4733731736734733/Forbidden-by-Angela-Ford.pdf
    • http://cefasfese.4pu.com/3731734735732739/Closure-by-Angela-Ford.pdf
    • http://cefasfese.4pu.com/4731738732737733/Sunset-Kisses-by-Angela-Ford.pdf
    • http://cefasfese.4pu.com/4736736735733738/Valentine-Romance-The-Best-Short-Story-Romances-by-Angela-Ford.pdf
    • http://cefasfese.4pu.com/4732730731738734/Spellbound-Cinderella-The-Cinderella-Body-Club-2-by-Angela-Ford.pdf
    • http://cefasfese.4pu.com/3738739731731733/Finding-Love-in-Eureka-California-Resort-to-Love-4-by-Angela-Ruth-Strong.pdf
    • http://cefasfese.4pu.com/2735732735733732/Love-is-Blind-by-William-Boyd.pdf
    • http://cefasfese.4pu.com/3730736730739737/Blind-Love-by-Wilkie-Collins.pdf
    • http://cefasfese.4pu.com/3738733736730736/Blind-With-Love-by-Becca-Jameson.pdf
    • http://cefasfese.4pu.com/2730733733732735/If-Love-Be-Blind-by-Emma-Goldrick.pdf
    • http://cefasfese.4pu.com/1737735732730733/Love-Blind-by-Christa-Desir.pdf
    • http://cefasfese.4pu.com/1739731739737738/Love-Is-Blind-by-Lynsay-Sands.pdf
    • http://cefasfese.4pu.com/1734738737739730/Must-Love-Chainmail-Must-Love-2-by-Angela-Quarles.pdf
    • http://cefasfese.4pu.com/6738736735734730/Blind-Love-Amour-Aveugle-by-E-S-Ellis.pdf
    • http://cefasfese.4pu.com/3737738732731735/Blind-Mazes-A-Study-Of-Love-by-George-W-Kelling.pdf
    • http://cefasfese.4pu.com/2739739732730732/Adam-s-List-NYC-Love-1-by-Jennifer-Ann.pdf
    • http://cefasfese.4pu.com/1739739733732733/Blind-Love-Sword-and-Silk-Trilogy-2-by-Sedonia-Guillone.pdf
    • http://cefasfese.4pu.com/1739736735735/Blind-Faith-Blind-Eye-3-by-Diane-Anderson-Minshall.pdf
    • http://cefasfese.4pu.com/2739736735730731/The-Love-List-Half-Moon-House-1-by-Deb-Marlowe.pdf

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