Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e17f52d92ed75e4…

MALICIOUS

PDF

17.7 KB Created: 2019-05-04 10:32:23 +01:00 Authoring application: mPDF 5.7
MD5: 9a56de76c6166f7f5017ed1b70cdfe41 SHA-1: b9a51bb95985b6276736fbac843657936ff3b8d6 SHA-256: 4e17f52d92ed75e40c1f605c7ff84c2f327ca7f7c7688a19e48af9726af82f57
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. While the URLs themselves are marked as benign, the sheer volume and structure suggest a link farm designed to direct users to potentially malicious content or to manipulate search engine rankings. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

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/2731739736733733/The-Equals-The-Ones-2-by-Daniel-Sweren-Becker.pdf
    • http://cefasfese.4pu.com/4739733737734732/This-Mean-Disease-Growing-Up-in-the-Shadow-of-My-Mother-s-Anorexia-Nervosa-by-Daniel-Becker.pdf
    • http://cefasfese.4pu.com/2739735734735738/Faust-Among-Equals-by-Tom-Holt.pdf
    • http://cefasfese.4pu.com/4732734739739733/Alliance-of-Equals-by-Sharon-Lee.pdf
    • http://cefasfese.4pu.com/2730735737730735/Geek---Boy-Equals-by-Kish-Knight.pdf
    • http://cefasfese.4pu.com/7732737730733737/Ten-Minus-Nine-Equals-Joanie-by-Clarice-Pont.pdf
    • http://cefasfese.4pu.com/3734734735732730/Alliance-of-Equals-Liaden-Universe-19-by-Sharon-Lee.pdf
    • http://cefasfese.4pu.com/9736734735731730/Dead-Funny-Flying-Dutch-and-Faust-Among-Equals-by-Tom-Holt.pdf
    • http://cefasfese.4pu.com/9730733737736734/The-Ernest-Becker-Reader-by-Ernest-Becker.pdf
    • http://cefasfese.4pu.com/1731733737736734730/Algorithms-Plus-Data-Structures-Equals-Programs-Prentice-Hall-series-in-automatic-computation-by-Niklaus-Wirth.pdf
    • http://cefasfese.4pu.com/9731735736737731/Collected-Plays-Two-Man-equals-Man-The-Elephant-Calf-The-Threepenny-Opera-The-Rise-and-Fall-of-the-City-of-Mahagonny-and-The-Seven-Deadly-Sins-by-Bertolt-Brecht.pdf
    • http://cefasfese.4pu.com/6738731730738739/Posthumous-memoirs-and-pedagogic-philosophical-confessions-by-Daniel-A-o-by-Daniel-A-o.pdf
    • http://cefasfese.4pu.com/2739735734738739/Daniel-and-the-Six-Element-Dragons-Daniel-and-the-Mysteries-2-by-Tamuna-Tsertsvadze.pdf
    • http://cefasfese.4pu.com/1730739731739739/Ecliptica-by-T-G-W-Becker.pdf
    • http://cefasfese.4pu.com/8739732736734736/The-Boxer-by-Jurek-Becker.pdf
    • http://cefasfese.4pu.com/1731736732732732735/Linked-by-Taran-Becker.pdf
    • http://cefasfese.4pu.com/4739736734730735/Outsiders-by-Howard-S-Becker.pdf
    • http://cefasfese.4pu.com/8734739732738739/Scented-Geraniums-by-Jim-Becker.pdf
    • http://cefasfese.4pu.com/3732738738734734/The-Star-Thief-by-Lindsey-Becker.pdf
    • http://cefasfese.4pu.com/3738735733736737/Seven-Little-Rabbits-by-John-Leonard-Becker.pdf

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