Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9bb39700e8924b4…

MALICIOUS

PDF

27.5 KB Created: 2019-05-02 05:05:50 +01:00 Authoring application: mPDF 5.7
MD5: c95be1ed79766b14023aa097d766ee14 SHA-1: 9f021e5b7c86dd3c7a575fc2eccf3c01a8416535 SHA-256: a9bb39700e8924b48b0b9a54f201d77653b91594dd4c398bc92b483c6ab64809
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier also flagged it as malicious, the specific intent beyond link farming is unclear due to the lack of executable scripts or clear malicious document body content. The URLs themselves appear to be benign, suggesting the primary malicious function is the link farm itself, potentially for SEO manipulation or to host further malicious content.

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/2735735737730730/Valley-Thunder-The-Battle-of-New-Market-and-the-Opening-of-the-Shenandoah-Valley-Campaign-May-1864-by-Charles-R-Knight.pdf
    • http://cefasfese.4pu.com/5737736735736/The-Final-World-Order-Thunder-Valley-Trilogy-2-by-Andre-Mikhailovich-Solonitsyn.pdf
    • http://cefasfese.4pu.com/3738731734732738/Summer-in-Snow-Valley-Snow-Valley-Romance-Anthologies-2-by-Cindy-Roland-Anderson.pdf
    • http://cefasfese.4pu.com/2730731733730736/The-Patmans-of-Sweet-Valley-Sweet-Valley-High-Magna-Editions-12-by-Francine-Pascal.pdf
    • http://cefasfese.4pu.com/8734730734733737/Rebel-Of-Ronde-Valley-by-Charles-H-Snow.pdf
    • http://cefasfese.4pu.com/8737732737738/The-Sweet-Valley-Cleanup-Team-Sweet-Valley-Kids-27-by-Francine-Pascal.pdf
    • http://cefasfese.4pu.com/2732735732731733/Sleigh-Bells-in-Valentine-Valley-Valentine-Valley-5-by-Emma-Cane.pdf
    • http://cefasfese.4pu.com/4738739735731733/Sweet-Valley-High-Collection-Double-Love-Secrets-Playing-with-Fire-Sweet-Valley-High-1-3-by-Francine-Pascal.pdf
    • http://cefasfese.4pu.com/9732732734735735/Bear-Valley-Valentine-Bear-Valley-Shifters-5-5-by-T-S-Joyce.pdf
    • http://cefasfese.4pu.com/9738738730737734/Yosemite-Valley-Map--Plano-del-Valle-Yosemite--Yosemite-Valley-Landkarte--Carte-de-La-Vallee-de-Yosemite-by-Tom-Harrison-Maps.pdf
    • http://cefasfese.4pu.com/9738737739739732/Yosemite-Valley-Map-Plano-del-Valle-Yosemite--Yosemite-Valley-Landkarte--Carte-de-La-Vallee-de-Yosemite-by-Tom-Harrison.pdf
    • http://cefasfese.4pu.com/8739731735732/Sweet-Valley-Twins-Collection-Jessica-s-No-Angel-Happy-Mother-s-Day-Lila-Jessica-Takes-Charge-Sweet-Valley-Twins-Super-Edition-11-115-116-by-Francine-Pascal.pdf
    • http://cefasfese.4pu.com/2735735737734737/And-Keep-Moving-On-The-Virginia-Campaign-May-June-1864-by-Mark-Grimsley.pdf
    • http://cefasfese.4pu.com/2735734738730737/Decision-In-The-West-The-Atlanta-Campaign-Of-1864-by-Albert-E-Castel.pdf
    • http://cefasfese.4pu.com/5730733733730731/Sweet-Valley-Twins-Summer-Diaries-Collection-Elizabeth-Next-Stop-Jr-High-Jessica-Next-Stop-Jr-High-Sweet-Valley-Twins-Super-Edition-13-14-by-Francine-Pascal.pdf
    • http://cefasfese.4pu.com/5731738733737732/The-Petersburg-Campaign-Volume-2-The-Western-Front-Battles-September-1864-April-1865-by-Edwin-C-Bearss.pdf
    • http://cefasfese.4pu.com/8737736739738730/The-Russo-Japanese-War-Illustrated-Edition-Complete-History-of-the-Conflict-Causes-of-the-War-Korean-Campaign-Naval-Operations-Battle-of-the-Yalu-Battle-of-the-Japan-Sea-Peace-Treaty-by-Sydney-Tyler.pdf
    • http://cefasfese.4pu.com/6737734734733/Sea-of-Thunder-Four-Commanders-and-the-Last-Great-Naval-Campaign-1941-1945-by-Evan-Thomas.pdf
    • http://cefasfese.4pu.com/6730737732730738/The-Battle-for-Butte-Mining-and-Politics-on-the-Northern-Frontier-1864-1906-by-Michael-P-Malone.pdf
    • http://cefasfese.4pu.com/4730739739737733/Onslaught-The-War-with-China--the-Opening-Battle-Dan-Lenson-16-by-David-Poyer.pdf

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