Malicious PDF — malware analysis report

Static analysis result for SHA-256 31563a73b5822b8c…

MALICIOUS

PDF

17.2 KB Created: 2019-05-01 05:15:38 +01:00 Authoring application: mPDF 5.7
MD5: c80c74cc2f522183b6b73c52ca42d916 SHA-1: 0d26c4f529bde4566225b1578885f85f9fab3c27 SHA-256: 31563a73b5822b8c1c7cef58cbf841fdb081d74bd018071b67f3f3fef3489110
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were extracted, the PDF structure and embedded URLs suggest a delivery mechanism for potentially harmful content, possibly related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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/3734739734733/Mio-My-Son-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1731734739733736/The-Tomten-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/4735735736730732/Pippi-Goes-to-the-Circus-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/7737734732731736/Karlson-Flies-Again-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/6736734736733738/Emil-And-The-Bad-Tooth-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1731730735739731736/Pippi-Moves-In-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/4737730733733739/Weihnachten-in-Bullerb-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/4738736738731734/Emil-s-Pranks-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/2730738733732734/Pippi-in-the-South-Seas-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/4737732737737/Pippi-in-the-South-Seas-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3738732738736737/Pippi-Longstocking-in-the-Park-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3730732733730737/Christmas-in-Noisy-Village-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1733738732739739/Emil-in-the-Soup-Tureen-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/3733738735730/Ronia-the-Robber-s-Daughter-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1739734732738734/Happy-Times-in-Noisy-Village-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/6734736732739737/Pippi-Langstrumpf-geht-an-Bord-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/1731730736730737738/The-New-Adventures-of-Pippi-Longstocking-2the-Story-Book-Based-on-the-Movie-by-Astrid-Lindgren.pdf
    • http://cefasfese.4pu.com/9737737737732734/Auswahlkriterien-Fur-Problemorientierte-Kinderliteratur-an-Den-Beispielen-Emil-Und-Die-Detektive-Von-Erich-Kastner-Anton-Zitterbacke-Von-Gerhard-Holtz-Baumert-Ronja-Raubertochter-Von-Astrid-Lindgren-by-Doro-Hoffmann.pdf
    • http://cefasfese.4pu.com/3738732

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