Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c379b1fb191253b…

MALICIOUS

PDF

19.6 KB Created: 2019-05-03 05:30:34 +01:00 Authoring application: mPDF 5.7
MD5: ab6382beeb7a641475b023e147fb29e8 SHA-1: be87b5a63bf2394900a2eec5252862a2bdc2d903 SHA-256: 4c379b1fb191253b1e25f819cbbb73125bd3ca35a9f3a3e8b7e0f0ec3a7384c2
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing:Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm with 25 external links, many of which are numeric SEO-optimized URLs. The ML classifier also flagged this PDF as malicious. The primary attack pattern appears to be SEO poisoning to drive traffic to potentially malicious content hosted on external domains. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9472

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/1730734735736730737/A-Genealogical-Record-of-One-Branch-of-the-Hemenway-Family-from-1634-to-1880-by-Asa-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736736732/A-Genealogical-Record-of-One-Branch-of-the-Hemenway-Family-From-1634-to-1880-by-Asa-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735735732737/The-Massachusetts-Hemenway-Family-Descendants-of-Ralph-Hemenway-of-Roxbury-Mass-1634-Rufus-Hemenway-by-Newton-Clair-Alonzo.pdf
    • http://cefasfese.4pu.com/1730734735735733730/The-Massachusetts-Hemenway-Family-Descendants-of-Ralph-Hemenway-of-Roxbury-Mass-1634-by-Anonymous.pdf
    • http://cefasfese.4pu.com/1730734735736730732/Ruth-V-Hemenway-M-D-A-Memoir-of-Revolutionary-China-1924-1941-by-Ruth-V-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736731731/Elf-Circles-by-R-D-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735737730734/Elden-Rue-by-R-D-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736736734/Dead-for-Sure-by-Chuck-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736736731/Programmed-Deception-by-Chuck-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736739738/GOSPEL-SINGERS-and-THEIR-SONGS-by-F-D-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735735735732/The-Little-Book-of-Mary-by-Priya-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736736736/Tangos-and-Jackals-by-Chuck-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735737730732/Parka-The-Adventure-Of-A-Boy-And-An-Arctic-Fox-by-Nancy-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736735738/Four-Days-the-Story-of-a-War-Marriage-by-Hetty-Hemenway.pdf
    • http://cefasfese.4pu.com/2733739739736737/A-Branch-of-Silver-a-Branch-of-Gold-The-Family-of-Night-1-by-Anne-Elisabeth-Stengl.pdf
    • http://cefasfese.4pu.com/1730734735737730731/Medicine-Chests-with-Suitable-Directions-by-Samuel-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736735732/Modern-Astronomy-An-Activities-Approach-by-Mary-Kay-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735735736739/The-Universe-Next-Door-A-Personal-Odyssey-by-Judith-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735736731733/Prices-and-Choices-Microeconomic-Vignettes-by-David-Hemenway.pdf
    • http://cefasfese.4pu.com/1730734735735736730/The-Little-Book-Of-Hindu-Gods-Evergreen-Series-by-Priya-Hemenway.pdf

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