Malicious PDF — malware analysis report

Static analysis result for SHA-256 797429164257953e…

MALICIOUS

PDF

15.5 KB Created: 2019-11-07 17:04:45 +00:00 Authoring application: mPDF 5.7
MD5: 0f02a5adfa7eab02caf909b447ed2eb6 SHA-1: e36c0183b813892c17f898ee9091ecce8eb8dc23 SHA-256: 797429164257953e3d9c38daef58f21138167f6f8bfda2c37b54e43d46d009c7
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO poisoning to drive traffic to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While the specific payload is not clear from the static analysis, the primary function appears to be redirecting users through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7564220-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7564220-0
  • 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/2737739734732/The-Blanket-That-Had-to-Go-by-Nancy-Evans-Cooney.pdf
    • http://cefasfese.4pu.com/1731738736730735731/The-Umbrella-Academy-Suite-Apocaliptica-Segundo-Acto-Umbrella-Academy-edici-n-r-stica-2-by-Gerard-Way.pdf
    • http://cefasfese.4pu.com/5735739735732738/The-Quotable-Evans-Diaries-Letter-and-Lessons-from-the-Novels-of-Richard-Paul-Evans-by-Richard-Paul-Evans.pdf
    • http://cefasfese.4pu.com/3735736737737738/Evans-Above-Constable-Evans-1-by-Rhys-Bowen.pdf
    • http://cefasfese.4pu.com/7730736738737/Umbrella-by-Taro-Yashima.pdf
    • http://cefasfese.4pu.com/1732737739738734/The-Umbrella-Man-and-Other-Stories-by-Roald-Dahl.pdf
    • http://cefasfese.4pu.com/8736736735736/The-Umbrella-Academy-Vol-2-Dallas-by-Gerard-Way.pdf
    • http://cefasfese.4pu.com/4731735730735737/The-Umbrella-Man-And-Other-Stories-by-Roald-Dahl.pdf
    • http://cefasfese.4pu.com/5736731731736738/The-Pink-Umbrella-by-Am-lie-Callot.pdf
    • http://cefasfese.4pu.com/8730736731733735/Bright-Turquoise-Umbrella-by-Hermine-Meinhard.pdf
    • http://cefasfese.4pu.com/1731731733733738730/Girl-with-Broken-Umbrella-by-Davor-Banovi-.pdf
    • http://cefasfese.4pu.com/4730739735736732/Binya-s-Blue-Umbrella-by-Ruskin-Bond.pdf
    • http://cefasfese.4pu.com/2731732738733736/An-Umbrella-for-Alex-by-Rachel-Rashkin--Shoot.pdf
    • http://cefasfese.4pu.com/8735731735733731/Umbrella-Academy-Composition-Book-by-Gerard-Way.pdf
    • http://cefasfese.4pu.com/3735730738738734/Trying-Out-Cheerleaders-1-by-Caroline-B-Cooney.pdf
    • http://cefasfese.4pu.com/2732730739738739/Thanksgiving-by-Ellen-Cooney.pdf
    • http://cefasfese.4pu.com/8737731739731730/Eleanor-by-Barbara-Cooney.pdf
    • http://cefasfese.4pu.com/1739735731739733/No-Such-Person-by-Caroline-B-Cooney.pdf
    • http://cefasfese.4pu.com/5734731739734730/Jack-o-the-Hills-by-C-S-E-Cooney.pdf
    • http://cefasfese.4pu.com/1731730736731730/The-Terrorist-by-Caroline-B-Cooney.pdf

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