Malicious PDF — malware analysis report

Static analysis result for SHA-256 251c7338a013b797…

MALICIOUS

PDF

15.4 KB Created: 2019-06-04 10:10:57 +01:00 Authoring application: mPDF 5.7
MD5: a9ae14579adb00cce40d3e81e1809466 SHA-1: 822d26a7fbe9d2d64892e00d06ad0f5c6e057a05 SHA-256: 251c7338a013b7973d7f69c657558d302de7f2dc41ba9fc350540373ecd2e0bf
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/1730731733736738730/The-Case-of-Dr-Dude-A-Michaela-McPherson-Mystery-Book-1-Michaela-McPherson-Mysteries-by-Judith-Lucci.pdf
    • http://cefasfese.4pu.com/1731738736730730733/Cara-and-the-Draca-by-Louisa-Kelley.pdf
    • http://cefasfese.4pu.com/1731738736730731733/Harbinger-of-Peace-Draconae-2-by-Kyrie-Draca.pdf
    • http://cefasfese.4pu.com/1731738736730731732/Glimpses-of-Destiny-The-Draca-Wards-Saga-Book-4-by-B-Pine.pdf
    • http://cefasfese.4pu.com/1739734737739736/The-Beauty-Game-by-Michaela-Day.pdf
    • http://cefasfese.4pu.com/3731738733734737/The-Old-Man-and-the-Afternoon-Cat-by-Michaela-Muntean.pdf
    • http://cefasfese.4pu.com/3731735735739738/The-Stars-Compel-by-Michaela-Roessner.pdf
    • http://cefasfese.4pu.com/4738730732732/Prisoners-in-the-Palace-by-Michaela-MacColl.pdf
    • http://cefasfese.4pu.com/7730739730738737/Paper-Phoenix-by-Michaela-Thompson.pdf
    • http://cefasfese.4pu.com/3731736734733735/Promise-the-Night-by-Michaela-MacColl.pdf
    • http://cefasfese.4pu.com/3731732735736738/The-Little-Engine-That-Could-and-the-Big-Chase-by-Michaela-Muntean.pdf
    • http://cefasfese.4pu.com/1730739739731737738/Echt-Winterk-che-by-Michaela-Baur.pdf
    • http://cefasfese.4pu.com/1731736736732730/Do-Not-Open-This-Book-by-Michaela-Muntean.pdf
    • http://cefasfese.4pu.com/6736739736737735/Disbelief-Michaela-amp-Trisha-4-by-Kate-Genet.pdf
    • http://cefasfese.4pu.com/7732736739733730/Recovery-in-Mental-Health-by-Michaela-Amering.pdf
    • http://cefasfese.4pu.com/1730737733736733739/Erinnerungen-Nichts-ist-so-unglaublich-wie-die-Wirklichkeit-by-Michaela-Ahrens.pdf
    • http://cefasfese.4pu.com/9735737738733733/H-kelanleitung-023-Schaf-Frieda-CrochetPerfect-by-Michaela-Stelling.pdf
    • http://cefasfese.4pu.com/6739734738738736/Riptide-Florida-Panhandle-Mystery-2-by-Michaela-Thompson.pdf
    • http://cefasfese.4pu.com/1731732738730730734/Die-Hauptstadt-des-Sex-Geschichte-amp-Geschichten-aus-Wien-by-Michaela-Lindinger.pdf
    • http://cefasfese.4pu.com/2730731731736739/Shadows-Fall-Michaela-amp-Trisha-2-by-Kate-Genet.pdf
    • http://cefasfese.4pu.com/1730739

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