Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f2695870915ee9…

MALICIOUS

PDF

21.0 KB Created: 2019-04-30 19:18:27 +01:00 Authoring application: mPDF 5.7
MD5: 78ce50e5bbc96fa959e720dfa5fb91c2 SHA-1: bbc093800384b1890361c2b5e91934c249e130e4 SHA-256: 55f2695870915ee97ce609b0cac5b36915c44a2dcc5b633d3d86dbe8563251c1
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, as indicated by the PDF_SEO_LINK_FARM heuristic. While the ML classifier strongly flagged this PDF as malicious, the specific intent beyond link farming is unclear due to the lack of executable scripts or a clear document body. The embedded URLs themselves are classified as benign, suggesting the primary malicious function is the distribution of links rather than direct payload delivery from this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://unieoooq.linkpc.net/54e24e44e64e14e5/Bleak-House-Annotated-Illustrated-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/54e84e84e24e14e7/Bleak-House-The-Original-Classics---Illustrated-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/84e04e34e04e44e6/Bleak-House-Color-Illustrated-Formatted-for-E-Readers-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/84e44e44e64e84e8/Bleak-House-With-Uniquely-drawn-original-illustrations-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/64e94e24e54e34e6/Bleak-House-Illustrated-with-Proof-Impressions-from-Designs-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/54e44e94e04e44e6/Bleak-House-Illustrated-with-Critical-Thinking-Discussion-Questions-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/44e94e64e04e24e7/A-House-to-Let-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/54e04e54e14e44e5/The-Haunted-House-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/14e14e54e44e44e34e8/OLIVER-TWIST-by-Charles-Dickens-Original-Illustrations-and-Annotated-with-Free-Audiobook-Link-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/64e44e04e04e24e5/Charles-Dickens-Great-Expectations-Hard-Times-A-Christmas-Carol-A-Tale-of-Two-Cities-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/74e94e84e24e64e2/Les-romans-de-Charles-Dickens-Le-Grillon-du-Foyer---Histoire-Fantastique-d-un-Int-rieur-Domestique-et-Aventures-de-Monsieur-Pickwick-Tome-I-et-II-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/74e14e34e14e34e5/Great-Expectations-By-Charles-Dickens-Illustrated-amp-Unabridged-Free-Bonus-Audiobook-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/14e14e74e64e44e64e2/The-Works-of-Charles-Dickens-in-Thirty-Volumes-Volume-3-Oliver-Twist-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/74e14e34e14e74e2/A-Christmas-Carol-By-Charles-Dickens-amp-Illustrated-An-Audiobook-Free-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/54e94e34e44e44e6/Oliver-Twist-By-Charles-Dickens---Illustrated-Comes-with-a-Free-Audiobook-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/94e84e34e44e04e1/Charles-Dickens-A-Christmas-Carol-A-Radio-Dramatization-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/54e64e84e14e84e0/Christmas-with-Charles-Dickens-A-Christmas-Carol-the-Chimes-the-Cricket-on-the-Hearth-the-Battle-of-Life-the-Haunted-Man-and-the-Ghost-s-Bargain-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/44e04e24e24e24e1/Charles-Dickens-Complete-Works-Dombey-and-Son-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/64e34e44e64e24e1/Great-Expectations-By-Charles-Dickens-Illustrated-by-Charles-Dickens.pdf
    • http://unieoooq.linkpc.net/14e04e84e34e24e24e1/David-Copperfield-By-Charles-Dickens-by-Charles-Dickens.pdf