Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5610b38a692d927…

MALICIOUS

PDF

12.1 KB Created: 2020-01-02 06:04:02 +00:00 Authoring application: mPDF 5.7
MD5: c365e129e5160ba17dae4a81b19f21b0 SHA-1: 5af7e27eb4a2d51776023b489f091a1e0230aa5c SHA-256: b5610b38a692d927552fa8fc84516036b50800bf7bc61860bc8229ed41f00d3b
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic. While most of these URLs point to benign content, the sheer volume and the nature of the heuristic suggest a malicious intent, possibly for SEO poisoning or to mask malicious redirects. The ML classifier also flagged the PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8737

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/3732732735734736/Gravity-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/4736739738738731/Cupcakes-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/4730731738733737/Velvet-Need-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/6731735737739730/Old-Ghosts-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/3734737736734733/Amnesia-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/1739739733738734/No-Regrets-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/2735737736730730/Working-It-Out-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/4731730739734732/Cupcakes-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/2731733731732736/Second-Sight-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/4734737731736735/New-The-Two-of-Swords-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/3737737733730739/Marked-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/6731735737739736/Working-Late-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/6731735737739738/Loving-Away-the-Grumps-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/6731735737739732/Possessor-and-Possessed-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/2737738730738734/Soaring-With-Hawk-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/2737738735735737/Smoke-and-Fire-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/4733734735730734/Love-is-Blindness-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/2732734730731737/Personal-Best-1-A-Going-for-the-Gold-Novel-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/1739739731730735/The-Broken-Road-by-Sean-Michael.pdf
    • http://cefasfese.4pu.com/6731735737739735/Re-Sounding-Love-by-Sean-Michael.pdf

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