Malicious PDF — malware analysis report

Static analysis result for SHA-256 276ed4bdb33d45c8…

MALICIOUS

PDF

25.8 KB Created: 2019-11-07 10:09:01 +00:00 Authoring application: mPDF 5.7
MD5: 9e6c4c2a34cc7817c0574d8356f989a5 SHA-1: f98952aa8a8bb6cbbe88e022ecab5eb67aace2dd SHA-256: 276ed4bdb33d45c86d3088f3c7b119a1d861cef9697d6a8863ddb8bbf2f31bdc
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, identified as a link farm. While the extracted URLs themselves are currently classified as benign, the sheer volume and the heuristic firing of 'PDF_SEO_LINK_FARM' suggest a malicious intent, likely to manipulate search engine results or redirect users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

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/8734734739738730/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson-Fiction-Classics-Fantasy-Horror-Literary-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/4737734731739732/The-Complete-Stories-of-Robert-Louis-Stevenson-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-and-Nineteen-Other-Tales-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/6738735734739736/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/7732738732739735/Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/2733731736732736/Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/1730732730736733731/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/5731734734738/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/6731735739737737/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/7730732738730735/The-Strange-Case-of-Dr-Jekyll-amp-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/6732739736737/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-and-Other-Tales-of-Terror-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/6734734738732738/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-and-Other-Tales-of-Terror-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/9731731734731733/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-The-100-Greatest-Books-Ever-Written-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/4730738738732733/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-Fables-amp-Other-Stories-and-Fragments-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/5739735732733736/Strange-Case-Of-Dr-Jekyll-And-Mr-Hyde-And-Dracula-Color-Illustrated-Formatted-for-E-Readers-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/5739732736735734/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde---Annotated-amp-Special-Illustrated-Edition-Free-Audio-Links-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/6739738735730730/The-Novels-of-R-L-Stevenson-Complete-Collection-13-Novels---Treasure-Island-The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-The-Black-Arrow-of-Ballantrae-The-Wrong-Box-and-others-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/1731738732736730730/The-Stange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/7737733732739736/The-Essential-Dr-Jekyll-and-Mr-Hyde-The-Definitive-Annotated-Edition-of-Robert-Louis-Stevenson-s-Classic-Novel-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/5732735732730734/Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/1730733737734732731/Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-Stevenson.pdf
    • http://cefasfese.4pu.com/1730732730736733731/The-Strange-Case-of-Dr-Jekyll-and-Mr-Hyde-by-Robert-Louis-S

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