Malicious PDF — malware analysis report

Static analysis result for SHA-256 841593339525c144…

MALICIOUS

PDF

14.9 KB Created: 2019-05-02 05:43:00 +01:00 Authoring application: mPDF 5.7
MD5: f500e3d77777e444a23f6d121befedb7 SHA-1: 6ef74b6b705307c5944e596143c1b58d2440f5e4 SHA-256: 841593339525c1449a5be3b2048458a70797aad4d2440f5f133322c426f589cb
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, which suggests an attempt to manipulate search engine results or redirect users to potentially malicious content. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the file. While the URLs themselves are currently flagged as benign, the sheer volume and the heuristic firings indicate a suspicious pattern, likely related to SEO spam or a link farm used to distribute malware.

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/4737730735736732/Bittersweet-True-North-1-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/4733730734/Keepsake-True-North-3-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/9732735735/Fireworks-True-North-6-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/6736738739/Bountiful-True-North-4-Brooklyn-Bruisers-4-5-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/4731735738732731/Temporary-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/8734734733/The-Accidentals-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/8738731733730733/Overnight-Sensation-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/8730734738732730/Coming-out-Fiert-2-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/1736730736734731/The-Understatement-of-the-Year-The-Ivy-Years-3-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/8738731734736732/The-Ivy-Years-Five-Complete-Novels-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/1739733736/The-Fifteenth-Minute-The-Ivy-Years-5-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/1734736734733738/The-Year-We-Fell-Down-The-Ivy-Years-1-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/3733733734739736/The-Understatement-of-the-Year-The-Ivy-Years-3-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/1738738739732737/The-Shameless-Hour-The-Ivy-Years-4-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/4737730735735736/Hard-Hitter-Brooklyn-Bruisers-2-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/5737736731/Pipe-Dreams-Brooklyn-Bruisers-3-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/1730735739737739734/Pipe-Dreams-Brooklyn-Bruisers-3-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/8738731733736736/Harlequin-E-Contemporary-Romance-Box-Set-Volume-1-Coming-in-from-the-Cold-Maid-to-Fit-Calling-His-Bluff-Baker-s-Law-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/8738731733730735/The-Ivy-Years-Collection-The-Ivy-Years-1-3-by-Sarina-Bowen.pdf
    • http://cefasfese.4pu.com/7730730738/Man-Hands-Man-Hands-1-by-Sarina-Bowen.pdf

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