Malicious PDF — malware analysis report

Static analysis result for SHA-256 48d301e19c22f415…

MALICIOUS

PDF

14.7 KB Created: 2019-05-01 13:06:49 +01:00 Authoring application: mPDF 5.7
MD5: b1aefc2849ec99a19c635a8271382589 SHA-1: 44ae641e112a21f6e41e9354334196c6194d28c3 SHA-256: 48d301e19c22f4154cf778f6588101f77ce24ba194e21b83b7f5628dc9cabb8c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier also flagged this PDF as malicious. The embedded URLs are the primary IOCs, and the dominant host is 'cefasfese.4pu.com'. No scripts were extracted from this sample.

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/4738735732738738/Kindness-Goes-Unpunished-Walt-Longmire-3-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/7738733731731/Kindness-Goes-Unpunished-Walt-Longmire-3-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/2739732733736/Another-Man-s-Moccasins-Walt-Longmire-4-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/2736735734737736/The-Highwayman-Walt-Longmire-11-5-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/3733735736734736/Dry-Bones-Walt-Longmire-11-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/3733738737738739/Another-Man-s-Moccasins-Walt-Longmire-4-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/3733736733735730/A-Serpent-s-Tooth-Walt-Longmire-9-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/4731733731/An-Obvious-Fact-Walt-Longmire-12-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/2739732731730738/The-Cold-Dish-Walt-Longmire-1-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/3733734739732736/An-Obvious-Fact-Walt-Longmire-12-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/8739731735/Depth-of-Winter-Walt-Longmire-14-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/1737739737739735/Divorce-Horse-Walt-Longmire-7-1-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/2736739739731732/Christmas-in-Absaroka-County-Walt-Longmire-8-1-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/7731737731734732/Indien-blanc-Une-enqu-te-de-Walt-Longmire-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/7733730732738734/Tous-les-d-mons-sont-ici-Une-enqu-te-de-Walt-Longmire-Noire-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/3738732730737733/Wait-for-Signs-Twelve-Longmire-Stories-by-Craig-Johnson.pdf
    • http://cefasfese.4pu.com/4735730737730733/Abounding-In-Kindness-Writings-for-the-People-of-God-by-Elizabeth-A-Johnson.pdf
    • http://cefasfese.4pu.com/4734730738736737/Unpunished-Gardiner-and-Renner-2-by-Lisa-Black.pdf
    • http://cefasfese.4pu.com/2739737739730736/The-Unpunished-Vice-A-Life-of-Reading-by-Edmund-White.pdf
    • http://cefasfese.4pu.com/1730739737738/No-Good-Duke-Goes-Unpunished-The-Rules-of-Scoundrels-3-by-Sarah-MacLean.pdf
    • http://cefasfese.4pu.com/27367397

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