Malicious PDF — malware analysis report

Static analysis result for SHA-256 efee1a624b2b3c00…

MALICIOUS

PDF

13.6 KB Created: 2019-05-03 06:02:17 +01:00 Authoring application: mPDF 5.7
MD5: e81b79a66bbf033570c65ae838c7339a SHA-1: d613e174071c3117b23ed03f8c17b89a16226902 SHA-256: efee1a624b2b3c00ba13042fb12381d7f2b8f1f454269ac98de4aaea63b1ca1b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic, which is indicative of SEO poisoning or link farming tactics. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were extracted, the sheer volume of links suggests an attempt to direct users to potentially malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/4737730733733739/Weihnachten-in-Bullerb-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3734739734733/Mio-My-Son-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1731734739733736/The-Tomten-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/4738736738731734/Emil-s-Pranks-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1730735732738736/Karlsson-on-the-Roof-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/2733735732738738/Rasmus-and-the-Vagabond-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/6736734736733738/Emil-And-The-Bad-Tooth-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/7737734732731736/Karlson-Flies-Again-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1731730735739731736/Pippi-Moves-In-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/4735735736730732/Pippi-Goes-to-the-Circus-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3730732733731734/The-Children-on-Troublemaker-Street-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/2730738733732734/Pippi-in-the-South-Seas-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3730732733730737/Christmas-in-Noisy-Village-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3733738735730/Ronia-the-Robber-s-Daughter-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3738732738736737/Pippi-Longstocking-in-the-Park-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1733738732739739/Emil-in-the-Soup-Tureen-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/4737732737737/Pippi-in-the-South-Seas-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/6734736732739737/Pippi-Langstrumpf-geht-an-Bord-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1739734732738734/Happy-Times-in-Noisy-Village-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1730732733735738730/-Mana-Loa-Zauberhafte-Weihnachten-by-Astrid-Rose.pdf
    • http://cefasfese.4pu.com/3733738735730/Ronia-

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