Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd786d74f6bc443…

MALICIOUS

PDF

15.6 KB Created: 2019-05-03 05:29:47 +01:00 Authoring application: mPDF 5.7
MD5: 16e5d82dab40e2a136e68fb3453bc3b1 SHA-1: d99c9d750f09ae37c6f6eba5c9718164eadd1f51 SHA-256: fcd786d74f6bc443c479e0d1fcfa18d64c5874454d7a454917e6571e35ce2991
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links pointing to external PDF files, a technique often used for SEO poisoning or to drive traffic to malicious sites. The ML classifier also flagged this document as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

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/9730734733735/Library-Mouse-Library-Mouse-1-by-Daniel-Kirk.pdf
    • http://cefasfese.4pu.com/1730736734734733/Full-Mouse-Empty-Mouse-A-Tale-of-Food-and-Feelings-by-Dina-Zeckhausen.pdf
    • http://cefasfese.4pu.com/6732739735732733/If-You-Give-a-Mouse-a-Cookie-Mini-Book-amp-Doll-With-Mouse-by-Laura-Joffe-Numeroff.pdf
    • http://cefasfese.4pu.com/4737734731738/The-Mouse-and-the-Motorcycle-Ralph-S-Mouse-1-by-Beverly-Cleary.pdf
    • http://cefasfese.4pu.com/4736735733739734/The-Mouse-on-the-Moon-The-Mouse-That-Roared-2-by-Leonard-Wibberley.pdf
    • http://cefasfese.4pu.com/1731731738739736738/The-Kohn-Hennig-Library-A-Catalog-by-The-South-Caroliniana-Library.pdf
    • http://cefasfese.4pu.com/8739737736738/Mouse-Guard-The-Black-Axe-Mouse-Guard-0-5-by-David-Petersen.pdf
    • http://cefasfese.4pu.com/1733739739730732/Ralph-S-Mouse-Ralph-S-Mouse-3-by-Beverly-Cleary.pdf
    • http://cefasfese.4pu.com/3739733739736736/A-Cat-Named-Mouse-A-Cat-Named-Mouse-5-by-Nick-James.pdf
    • http://cefasfese.4pu.com/2739733737732736/The-Mouse-That-Roared-The-Mouse-That-Roared-1-by-Leonard-Wibberley.pdf
    • http://cefasfese.4pu.com/2734735736/Mr-Lemoncello-s-Library-Olympics-Mr-Lemoncello-s-Library-2-by-Chris-Grabenstein.pdf
    • http://cefasfese.4pu.com/1733730737738/Escape-from-Mr-Lemoncello-s-Library-Mr-Lemoncello-s-Library-1-by-Chris-Grabenstein.pdf
    • http://cefasfese.4pu.com/1730734735738733/The-Invisible-Library-The-Invisible-Library-1-by-Genevieve-Cogman.pdf
    • http://cefasfese.4pu.com/6734734737730731/Chronicles-The-Library-of-Illumination-The-Library-of-Illumination-1-5-by-C-A-Pack.pdf
    • http://cefasfese.4pu.com/3730739734739731/Library-Wars-Love-amp-War-Vol-8-Library-Wars-Love-amp-War-8-by-Kiiro-Yumi.pdf
    • http://cefasfese.4pu.com/6731735732737730/The-Greentail-Mouse-by-Leo-Lionni.pdf
    • http://cefasfese.4pu.com/5731739736737735/More-than-a-Mouse-by-Penny-Reeve.pdf
    • http://cefasfese.4pu.com/4735733732734730/Cat-and-Mouse-by-Christianna-Brand.pdf
    • http://cefasfese.4pu.com/8731733737732733/Marmaduke-Mouse-1-by-Ernie-Hart.pdf
    • http://cefasfese.4pu.com/2737737738735/Blabber-Mouse-by-True-Kelley.pdf
    • http://cefasfese.4pu.com/2734735736/Mr

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