Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47a59dd30123712…

MALICIOUS

PDF

17.8 KB Created: 2019-06-04 12:20:20 +01:00 Authoring application: mPDF 5.7
MD5: def3d4901d6e6bdbf065359297515a72 SHA-1: 6be920d936e831aeb087098255865a688bc1a068 SHA-256: b47a59dd301237122e640349d44386ac13b92c262becb7ed92f2c3693daa073a
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external link farm, with 24 links identified. The ML classifier also strongly indicated maliciousness. While the document body is heavily corrupted, the presence of numerous links, many pointing to book titles, suggests a potential SEO poisoning or redirection scheme. The primary IOCs are the URLs identified in the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

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/5734732731736731/Duras-Moderato-Cantabile-by-David-Coward.pdf
    • http://cefasfese.4pu.com/5734732732733734/Moderato-cantabile-de-Marguerite-Duras-Fiche-de-lecture-R-sum-complet-et-analyse-d-taill-e-de-l-oeuvre-by-El-onore-Quinaux.pdf
    • http://cefasfese.4pu.com/5734732732733731/Study-Guide-Moderato-Cantabile---Advanced-Placement-French-Literature-by-Stephen-C-Clem.pdf
    • http://cefasfese.4pu.com/4739733739732732/Coward-Plays-2-Private-Lives-Bitter-Sweet-The-Marquise-Post-Mortem-by-No-l-Coward.pdf
    • http://cefasfese.4pu.com/4739734735735733/Coward-Plays-6-Semi-Monde-Point-Valaine-South-Sea-Bubble-Nude-With-Violin-by-No-l-Coward.pdf
    • http://cefasfese.4pu.com/6735730735732733/The-Philosophy-Of-Restif-De-La-Bretonne-by-David-Coward.pdf
    • http://cefasfese.4pu.com/6739734732732736/Marivaux-La-Vie-de-Marianne-and-Le-Paysan-Parvenu-by-David-Coward.pdf
    • http://cefasfese.4pu.com/4738735737730735/Nodame-Cantabile-Vol-5-Nodame-Cantabile-5-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/5733736739731736/Nodame-Cantabile-Vol-3-Nodame-Cantabile-3-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/5733736739731735/Nodame-Cantabile-Vol-4-Nodame-Cantabile-4-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/4738735736738732/Nodame-Cantabile-Vol-10-Nodame-Cantabile-10-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/4738735737730739/Nodame-Cantabile-Vol-13-Nodame-Cantabile-13-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/4738735737731730/Nodame-Cantabile-Vol-16-Nodame-Cantabile-16-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/5733736739731737/Nodame-Cantabile-Vol-11-Nodame-Cantabile-11-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/5733736739731734/Nodame-Cantabile-Vol-2-Nodame-Cantabile-2-by-Tomoko-Ninomiya.pdf
    • http://cefasfese.4pu.com/4730731734737731/The-Letters-of-No-l-Coward-by-No-l-Coward.pdf
    • http://cefasfese.4pu.com/5734732731736738/Allegro-Moderato-Score-amp-Parts-by-Tomaso-Albinoni.pdf
    • http://cefasfese.4pu.com/5734732732732733/Moderato-amp-Nocturnefrom-Sonatina-Romantica-1940-For-Solo-Piano-by-Benjamin-Britten.pdf
    • http://cefasfese.4pu.com/1732734737738734/Hay-Fever-by-No-l-Coward.pdf
    • http://cefasfese.4pu.com/2736735734738735/Private-Lives-by-No-l-Coward.pdf
    • http://cefasfese.4pu.com/4739733739732732/Coward-Plays-2-Private-Lives-

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