Malicious PDF — malware analysis report

Static analysis result for SHA-256 5871a8acc98886aa…

MALICIOUS

PDF

15.9 KB Created: 2019-04-30 09:14:31 +01:00 Authoring application: mPDF 5.7
MD5: a4f3c9df58c37704a3c9fe50faaabb40 SHA-1: 09dd344c4f5e0bd2a05cff5f912a9c60d09129a0 SHA-256: 5871a8acc98886aa14bb95598b097b673a983325dcd3a5a60e774b5e0d501715
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The document body consists primarily of these URLs, suggesting a tactic to drive traffic to external sites, potentially for SEO poisoning or phishing. No scripts were extracted, and the URLs themselves are currently classified as benign, but the sheer volume and the heuristic firing indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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/2738736731738733/A-Gentleman-of-Substance-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/3735735734732734/A-Gentleman-of-Substance-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/4737738731732739/Post-Obsessions-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/3737737731733732/Belling-the-Cat-Bloodrose-3-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/4737738737739730/Thrust-and-Riposte-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/1739739733739732/Splitting-the-Difference-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/6737730736732730/Tumbling-Cirque-Caprice-2-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/3737737733732730/An-Itch-to-Scratch-Bloodrose-1-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/4731738739736733/Landing-with-Both-Feet-Thatchers-2-by-Julia-Talbot.pdf
    • http://cefasfese.4pu.com/1737734736730731/Pleasure-Island-Pleasure-Cruise-3-by-Mandy-M-Roth.pdf
    • http://cefasfese.4pu.com/1737737734736731/Pleasure-Pleasure-Pain-or-Purpose-1-by-Al-Daltrey.pdf
    • http://cefasfese.4pu.com/8735736739739739/Male-Multiple-Orgasm-The-Ultimate-Guide-on-Becoming-a-Multi-Orgasmic-Man-Gain-Ultimate-Control---Get-More-Pleasure---Give-More-Pleasure-by-B-Foyer.pdf
    • http://cefasfese.4pu.com/7735730731734/For-His-Pleasure-For-His-Pleasure-1-by-Kelly-Favor.pdf
    • http://cefasfese.4pu.com/4739735732730739/Julia-the-Secret-Keeper-Julia-s-Secrets-1-by-Franky-A-Brown.pdf
    • http://cefasfese.4pu.com/3730737735736735/In-Julia-s-Kitchen-with-Master-Chefs-by-Julia-Child.pdf
    • http://cefasfese.4pu.com/1732732730739734/The-Vampire-s-House-of-Pleasure-Part-1-The-Vampire-s-House-of-Pleasure-1-by-Rose-Wynters.pdf
    • http://cefasfese.4pu.com/4732734736736738/Night-Things-by-Michael-Talbot.pdf
    • http://cefasfese.4pu.com/6738731736737734/Reading-Nelligan-by-Emile-J-Talbot.pdf
    • http://cefasfese.4pu.com/1731736731733738730/Lost-In-Kakadu-by-Kendall-Talbot.pdf
    • http://cefasfese.4pu.com/1733739731738738/The-Talbot-Odyssey-by-Nelson-DeMille.pdf
    • http://cefasfese.4pu.com/8735736739739739/Male-Multiple-Orgasm-The-Ultimate-Guide-on

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