Malicious PDF — malware analysis report

Static analysis result for SHA-256 8403dd36e077c9a9…

MALICIOUS

PDF

16.0 KB Created: 2019-11-28 22:24:38 +00:00 Authoring application: mPDF 5.7
MD5: e0231ebcd6f687b15805e5f419d4d736 SHA-1: bc2b308a9876ff3f195b4d043821a02b28327e8f SHA-256: 8403dd36e077c9a9dedd687a24cd737251134e2d7810e4ffbf121439ba3edbe9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to a single domain, identified by the PDF_SEO_LINK_FARM heuristic. While many of these URLs were individually classified as benign, the sheer volume and the suspicious domain suggest a malicious intent, possibly for SEO manipulation or to distribute further malware. The ML classifier also flagged this PDF as malicious.

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/9733734730737/Portrait-of-a-Prot-g-Portraits-2-by-J-B-Chicoine.pdf
    • http://cefasfese.4pu.com/6735734739736735/Photography-Portrait-Photography-7-Simple-Techniques-For-Capturing-Jaw-Dropping-Portraits-Even-If-You-re-A-Beginner-by-Erik-Adamo.pdf
    • http://cefasfese.4pu.com/1736733734735733/The-Worlds-of-Prot-K-Pax-3-by-Gene-Brewer.pdf
    • http://cefasfese.4pu.com/1737733731737735/Blind-Stitches-by-J-B-Chicoine.pdf
    • http://cefasfese.4pu.com/7732735733734731/Carpe-Diem-Canadian-Anthology-of-Haiku-by-Francine-Chicoine.pdf
    • http://cefasfese.4pu.com/4738739731731731/Portrait-du-colonis-Portrait-du-colonisateur-by-Albert-Memmi.pdf
    • http://cefasfese.4pu.com/4735735731732733/A-Portrait-of-Phillip-Portrait-1-by-J-P-Bowie.pdf
    • http://cefasfese.4pu.com/7735730733739732/Carol-and-John-Steinbeck-Portrait-of-a-Marriage-Portrait-of-a-Marriage-by-Susan-Shillinglaw.pdf
    • http://cefasfese.4pu.com/3733738730738736/500-Portraits-by-Tony-Millionaire.pdf
    • http://cefasfese.4pu.com/3739732738738738/500-Self-Portraits-by-Julian-Bell.pdf
    • http://cefasfese.4pu.com/3735739731732734/Portraits-of-Celina-by-Sue-Whiting.pdf
    • http://cefasfese.4pu.com/1731738733733737/First-Son-Portraits-By-C-D-Hoy-by-Faith-Moosang.pdf
    • http://cefasfese.4pu.com/7734731733737732/Some-Portraits-of-Women---by-Paul-Bourget.pdf
    • http://cefasfese.4pu.com/5730738739731739/Portraits-In-Steel-by-Milton-Rogovin.pdf
    • http://cefasfese.4pu.com/8730731732738735/Pussy-Portraits-by-Frannie-Adams.pdf
    • http://cefasfese.4pu.com/5735739737730/Louisbourg-Portraits-by-Christopher-Moore.pdf
    • http://cefasfese.4pu.com/9738732735737739/Ingar-Krauss-Portraits-by-Vince-Aletti.pdf
    • http://cefasfese.4pu.com/7734731734732732/Antigone-And-Other-Portraits-Of-Women-by-Paul-Bourget.pdf
    • http://cefasfese.4pu.com/1731733732734737730/Microsculpture-Portraits-of-Insects-by-Levon-Biss.pdf
    • http://cefasfese.4pu.com/5731732739734734/Correspondences-A-poem-and-portraits-by-Anne-Michaels.pdf

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