Malicious PDF — malware analysis report

Static analysis result for SHA-256 f52f9d08ab9cad92…

MALICIOUS

PDF

13.0 KB Created: 2019-05-05 13:41:43 +01:00 Authoring application: mPDF 5.7
MD5: b1e741f81897c607ef8d9bd77ac4694e SHA-1: b258db7b479ac897c3303a19c62dbde6e155cb69 SHA-256: f52f9d08ab9cad927ff782643fe27811333739a09e9a75ac10934761cd8066cb
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, forming a link farm. The primary heuristic indicates this is a SEO spam technique, likely intended to drive traffic to external sites. The embedded URLs, while individually marked as benign, collectively form the malicious pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8891

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/6738735735731734/Bundle-F-te-des-m-res---Nora-Roberts-La-saga-des-O-Hurley-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/3739733731732735/Liar-Liar-The-Theory-Practice-and-Destructive-Properties-of-Deception-Liar-Liar-1-by-Gary-Paulsen.pdf
    • http://cefasfese.4pu.com/1738736735733734/The-Next-Always-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/6732734733737730/Ao-P-r-Do-Sol-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/1738736739736732/Ever-After-Once-Upon-2-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/9730739737730/Hot-Ice-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/1732734738739730/The-Collector-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/6730732735730736/L-le-des-secrets-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/4738735735738733/The-Villa-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/4737739731738736/Tribute-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/2735739736733731/Less-of-a-Stranger-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/8730738738731/The-Witness-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/2735739736733737/Once-More-With-Feeling-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/3738739737739735/Homeport-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/1730735732731730/The-Search-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/3738733734739738/The-Law-Is-a-Lady-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/3739732738737738/The-Villa-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/2734738738731738/The-Collector-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/3734737734737731/Montana-Sky-by-Nora-Roberts.pdf
    • http://cefasfese.4pu.com/4738738733738739/Montana-Sky-by-Nora-Roberts.pdf

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