Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa7c8599d7b7a9f…

MALICIOUS

PDF

15.6 KB Created: 2019-09-27 13:34:11 +01:00 Authoring application: mPDF 5.7
MD5: 0748226aadcefaf5bdc4659ec981723b SHA-1: 2285d55aa166a47427f1f65a266fa265f9fd0893 SHA-256: 1aa7c8599d7b7a9fc0ae09ef4339ece7d11257741bc2d386cd5172e3954e6fbc
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, forming a link farm. The primary heuristic indicates this is a "PDF_SEO_LINK_FARM" designed to distribute external PDF files, likely for SEO manipulation or to host malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous links to book-related PDFs suggests a lure for potentially pirated content.

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/1730737739730739737/Fifty-Shades-Trilogy-Fifty-Shades-of-Grey-Fifty-Shades-Darker-Fifty-Shades-Freed-3-volume-a-review-by-Nick-Walton.pdf
    • http://cefasfese.4pu.com/7733732730732733/Fifty-Shades-Darker-Book-2-of-the-Fifty-Shades-trilogy-by-E-L-James.pdf
    • http://cefasfese.4pu.com/7733732730732736/Fifty-Shades-Freed-Book-Three-of-the-Fifty-Shades-Trilogy-by-E-L-James.pdf
    • http://cefasfese.4pu.com/3739734739730732/Fifty-Shades-Darker-Fifty-Shades-2-by-E-L-James.pdf
    • http://cefasfese.4pu.com/3732733736739/Fifty-Shades-Darker-Fifty-Shades-2-by-E-L-James.pdf
    • http://cefasfese.4pu.com/1738735736735736/Fifty-Shades-Darker-Fifty-Shades-2-by-E-L-James.pdf
    • http://cefasfese.4pu.com/7732738738736736/Fifty-Shades-Darker---Greek-Edition-by-E-L-James.pdf
    • http://cefasfese.4pu.com/7737730733733/Grey-and-Darker-Fifty-Shades-as-Told-by-Christian-1-2-by-E-L-James.pdf
    • http://cefasfese.4pu.com/9736730734/Fifty-Shades-Freed-Fifty-Shades-3-by-E-L-James.pdf
    • http://cefasfese.4pu.com/4738738737734735/The-Fifty-Shades-Trilogy-amp-Grey-by-E-L-James.pdf
    • http://cefasfese.4pu.com/1730736739739736732/Fifty-Years-of-Gray-Fifty-Shades-of-Grey-A-Parody-Short-by-Alanna-Heck.pdf
    • http://cefasfese.4pu.com/1730737739731731738/Shades-of-Control-Fifty-by-Fifty-by-Michelle-Fox.pdf
    • http://cefasfese.4pu.com/5737734737735734/Fifty-Shades-of-BDSM-Trilogy-by-Sky-Corgan.pdf
    • http://cefasfese.4pu.com/8736738736731732/Fifty-Shades-of-Grey-Gef-hrliche-Liebe-by-E-L-James.pdf
    • http://cefasfese.4pu.com/1730735735732735736/Satutettu-Fifty-Shades-of-Grey-Christianin-kertomana-2-by-E-L-James.pdf
    • http://cefasfese.4pu.com/9734735730735737/A-Belief-in-Belting-Fifty-Shades-of-Pray-Book-2-by-Emine-Rowwe.pdf
    • http://cefasfese.4pu.com/7730732732730733/FIFTY-SHADES-OF-IKEA-by-Robin-Segal.pdf
    • http://cefasfese.4pu.com/5734734730730736/Fifty-Shades-of-Gatsby-by-Lillian-Jacobs.pdf
    • http://cefasfese.4pu.com/7734736733735/Grey-Fifty-Shades-of-Grey-as-Told-by-Christian-Book-Summary-by-Elite-Summaries.pdf
    • http://cefasfese.4pu.com/1738733739737730/Fifty-Shades-of-Taylor-by-Jane-Harvey-Bberrick.pdf

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