Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f4caa960a5ec027…

MALICIOUS

PDF

14.6 KB Created: 2019-05-02 07:18:20 +01:00 Authoring application: mPDF 5.7
MD5: 26421e94155da5646c5b5c0e9f1c06ca SHA-1: 3c1bb31e2fe91bc375db44ebbbd03a2917c971ac SHA-256: 5f4caa960a5ec02753b001ba4d6aa8684812f01ca19477f4fbd527d2fe8fe217
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. These URLs point to external PDF files, suggesting a link farm or a method to distribute potentially malicious content. While the ML classifier flagged the PDF as malicious, the specific intent beyond linking is unclear due to the lack of executable scripts.

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.4pu.com/1737731738738735/August-Heat-Men-of-August-4-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/3730730734738731/Heather-s-Gift-Men-of-August-3-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/4734737730731735/Kiss-of-Heat-Breeds-4-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/3733734734735735/Lion-s-Heat-Breeds-15-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/6737738730731/Atlanta-Heat-Tempting-SEALs-6-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/2739736735739731/Primal-Heat-Includes-Breeds-8-5-Devlin-Dynasty-1-Moon-Lust-1-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/1731732732737739734/Emma-Eine-Familiengeschichte-in-Zwen-Theilen-Von-August-LaFontaine-by-August-Lafontaine.pdf
    • http://cefasfese.4pu.com/5736731731732/The-Tribulations-of-August-Barton-August-Barton-1-by-Jennifer-LeBlanc.pdf
    • http://cefasfese.4pu.com/8736737734735730/August-Sander-Landschaften-by-August-Sander.pdf
    • http://cefasfese.4pu.com/1734738733731731/Sealed-with-a-Wish-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/1737730733739739/Enigma-Elite-Ops-6-5-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/5734735734734/Renegade-Elite-Ops-5-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/1735731738736730/August-9th-by-Stu-Schreiber.pdf
    • http://cefasfese.4pu.com/2732730738731732/Never-Have-I-Ever-by-August-Clearwing.pdf
    • http://cefasfese.4pu.com/1736736733737734/Secret-Sins-The-Callahans-3-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/1736739739734736/Seduction-Bound-Hearts-3-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/6735739731738/Navarro-s-Promise-Breeds-17-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/3730735736738733/Styx-s-Storm-Breeds-16-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/4730730730738733/Elizabeth-s-Wolf-Breeds-3-by-Lora-Leigh.pdf
    • http://cefasfese.4pu.com/3733738735735734/Lawe-s-Justice-Breeds-18-by-Lora-Leigh.pdf

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