Malicious PDF — malware analysis report

Static analysis result for SHA-256 79cd454c6152d552…

MALICIOUS

PDF

17.0 KB Created: 2019-08-02 07:36:40 +01:00 Authoring application: mPDF 5.7 First seen: 2021-10-11
MD5: 6339e82da6bec7c48b23bd148c10271d SHA-1: 88caff9a7f143f4c43c013a60e3efc7f21eef09e SHA-256: 79cd454c6152d5522b0781cf98a5c412c24f56861ae74b4b3058bff9715a081a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. These URLs point to external PDF files, suggesting a link farm or a method to distribute further malicious content. 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 0.9787

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/8731731736731736/A-Heart-at-Home-An-Everlasting-Heart-3-by-Sara-Barnard.pdf In PDF document text
    • http://cefasfese.4pu.com/1732733737733737/A-Heart-Broken-An-Everlasting-Heart-2-by-Sara-Barnard.pdfIn PDF document text
    • http://cefasfese.4pu.com/4739739738731739/A-Heart-s-Home-A-Journey-of-the-Heart-6-by-Colleen-Coble.pdfIn PDF document text
    • http://cefasfese.4pu.com/2731732730737736/Savage-Heart-Savages-MC-0-5-by-Sara-Fawkes.pdfIn PDF document text
    • http://cefasfese.4pu.com/4732733731735730/Searching-for-Sara-Heart-of-the-Blessed-1-by-Nona-Mae-King.pdfIn PDF document text
    • http://cefasfese.4pu.com/4730735730734/Cross-My-Heart-Hope-to-Die-The-Lying-Game-5-by-Sara-Shepard.pdfIn PDF document text
    • http://cefasfese.4pu.com/7731737735731730/Heart-Chakra-Cleansing-A-Guide-to-Heart-Chakra-Meditation-and-Heart-Chakra-Healing-by-Priya-Chevallier.pdfIn PDF document text
    • http://cefasfese.4pu.com/3737737733734738/Heart-s-Home-by-H-B-Pattskyn.pdfIn PDF document text
    • http://cefasfese.4pu.com/5739738731738730/The-Book-of-SHE-Your-Heroine-s-Journey-into-the-Heart-of-Feminine-Power-by-Sara-Avant-Stover.pdfIn PDF document text
    • http://cefasfese.4pu.com/4730736733730731/Home-is-Where-the-Heart-is-by-Christie-Mack.pdfIn PDF document text
    • http://cefasfese.4pu.com/4732732732733736/A-Heart-s-Home-by-Laura-J-Marshall.pdfIn PDF document text
    • http://cefasfese.4pu.com/9733730738737739/Heart-and-Home-by-Jennifer-Melzer.pdfIn PDF document text
    • http://cefasfese.4pu.com/1731738732737738730/Going-Home-Cycling-Through-the-Heart-of-America-by-Ken-Stange.pdfIn PDF document text
    • http://cefasfese.4pu.com/2736736736736733/Home-is-Where-the-Heart-is-by-Kooler-Design-Studio.pdfIn PDF document text
    • http://cefasfese.4pu.com/3731731737739738/Chunky-Sugars-by-Sara-Barnard.pdfIn PDF document text
    • http://cefasfese.4pu.com/2736733737/Beautiful-Broken-Things-by-Sara-Barnard.pdfIn PDF document text
    • http://cefasfese.4pu.com/6731738739731734/Fierce-Fragile-Hearts-by-Sara-Barnard.pdfIn PDF document text
    • http://cefasfese.4pu.com/4734739733739730/At-the-Heart-s-Command-A-Place-Called-Home-2-by-Patricia-McLinn.pdfIn PDF document text
    • http://cefasfese.4pu.com/3738734737738737/Loving-Our-Kids-on-Purpose-Making-a-Heart-To-Heart-Connection-by-Danny-Silk.pdfIn PDF document text
    • http://cefasfese.4pu.com/5734737736735732/Living-in-the-Heart-How-to-Enter-Into-the-Sacred-Space-Within-the-Heart-With-CD-by-Drunvalo-Melchizedek.pdfIn PDF document text

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