Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6077e8552edcd11…

MALICIOUS

PDF

16.8 KB Created: 2019-04-30 08:08:42 +01:00 Authoring application: mPDF 5.7
MD5: 4f5cc84f28ad2bed2cf5d233c69c868b SHA-1: 3ff0b4c2a835c1ddbc0cc2ec95d2496692df7663 SHA-256: a6077e8552edcd11d668aa654adc3d59a88d0a1b10bd216e94fd8165308f2491
60 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, identified as a link farm. While many of these URLs are marked as benign, the sheer volume and the heuristic firing suggest a malicious intent, possibly for SEO manipulation or to distribute further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities. The primary attack pattern observed is the use of a PDF to host a link farm.

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/3739736738735730/The-Not-So-Boring-Letters-of-Private-Nobody-by-Matthew-Landis.pdf
    • http://cefasfese.4pu.com/2731739732730732/League-of-American-Traitors-by-Matthew-Landis.pdf
    • http://cefasfese.4pu.com/1731738731737731731/Runt-to-Warrior-by-Boring-Irvin-Boring.pdf
    • http://cefasfese.4pu.com/4732735736738734/Hughes-The-Private-Diaries-Memos-amp-Letters-by-Richard-Hack.pdf
    • http://cefasfese.4pu.com/1730733732731734/Writings-Autobiography-Notes-on-the-State-of-Virginia-Public-and-Private-Papers-Addresses-Letters-by-Thomas-Jefferson.pdf
    • http://cefasfese.4pu.com/8737738739732/Henry-Ponsonby-Queen-Victoria-s-Private-Secretary-His-Life-from-His-Letters-by-Arthur-P-Ponsonby.pdf
    • http://cefasfese.4pu.com/1731735735734/Private-Practice-Private-Pleasures-1-by-Samanthe-Beck.pdf
    • http://cefasfese.4pu.com/3730736731730734/Private-Games-Private-3-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/1737735735732739/A-Private-Collection-Private-1-4-by-Kate-Brian.pdf
    • http://cefasfese.4pu.com/3730737736/Private-Paris-Private-10-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/6732739731739/Private-Berlin-Private-5-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/1732738737736739/Private-India-Private-8-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/6738/Private-Vegas-Private-9-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/9739732733731730/Private-Passions-Private-4-by-Jami-Alden.pdf
    • http://cefasfese.4pu.com/7735739735739735/Private-Gold-Private-13-5-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/5735732738733735/Letters-of-Isaac-Bobin-Esq-Private-Secretary-of-Hon-George-Clarke-Secretary-of-the-Province-of-New-York-1718-1730-by-Isaac-Bobin.pdf
    • http://cefasfese.4pu.com/2736736739732738/Private-L-A-Private-6-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/4733732736735/Private-Private-1-by-James-Patterson.pdf
    • http://cefasfese.4pu.com/1733738738739733/David-Boring-by-Daniel-Clowes.pdf
    • http://cefasfese.4pu.com/2731735738731737/Boring-Girls-by-Sara-Taylor.pdf

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