Malicious PDF — malware analysis report

Static analysis result for SHA-256 55462256dfc43c33…

MALICIOUS

PDF

16.4 KB Created: 2019-05-02 05:14:13 +01:00 Authoring application: mPDF 5.7
MD5: 9d989fc31b62ed6fab56c3ed1cacad68 SHA-1: 899bebaebd7c8cfe89fd4998ea454481fa3c1bc5 SHA-256: 55462256dfc43c337fd2ed578578279fd4a9428750de525143e317af5de15697
150 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 as a link farm, pointing to book download sites. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary attack pattern involves directing users to these external URLs, likely for SEO spam or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9898

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7383397-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7383397-0
  • 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/7731736733735737/Of-Mice-and-Men-Steinbeck-Tribute-Edition-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/4732731737731733/The-Steinbeck-Centennial-Collection-The-Grapes-of-Wrath-Of-Mice-and-Men-East-of-Eden-The-Pearl-Cannery-Row-Travels-With-Charley-in-Search-of-America-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/7735730731734733/The-Grapes-of-Wrath-The-Moon-is-Down-Cannery-Row-East-of-Eden-Of-Mice-amp-Men-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/7735730733738730/My-Life-with-John-Steinbeck-The-Story-of-John-Steinbeck-s-Forgotten-Wife-by-Gwyn-Conger-Steinbeck.pdf
    • http://cefasfese.4pu.com/7735730733738731/Cliffsnotes-on-Steinbeck-s-of-Mice-and-Men-by-James-Lamar-Roberts.pdf
    • http://cefasfese.4pu.com/7735730733733731/The-Other-Side-of-Eden-Life-With-John-Steinbeck-by-John-Steinbeck-IV.pdf
    • http://cefasfese.4pu.com/7735730733738736/The-Essential-Steinbeck-Four-Complete-Novels-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/7735730732735730/The-Works-of-John-Steinbeck-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/4730730737730/The-Moon-Is-Down-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/6732734733739734/-st-for-Paradis-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/1739730734739733/The-Log-from-the-Sea-of-Cortez-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/3734733732734/To-a-God-Unknown-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/7735730733733732/The-Gift-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/5736739736739/The-Wayward-Bus-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/2736732736738738/The-Wayward-Bus-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/8733735734734738/La-perle-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/4734733730732736/The-Pearl-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/5738736730731737/The-Pearl-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/6738736735736734/The-Pearl-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/5736733739737/Omnibus-by-John-Steinbeck.pdf
    • http://cefasfese.4pu.com/7735730733733731/The-Other-Side-of-Eden-Life-With-John-Steinbeck-by-John-Stei

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