Malicious PDF — malware analysis report

Static analysis result for SHA-256 b795345bf7921d32…

MALICIOUS

PDF

12.1 KB Created: 2015-07-15 19:47:27 +03:00 Authoring application: DOMPDF
MD5: 05ab8476037477d58a60cd2745a161ee SHA-1: d6725c93898215f4ecc2bb04533d0e2a96241527 SHA-256: b795345bf7921d32be422f295f6510bf7c111bc810836e409385c11edfb06588
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, forming a link farm. This is indicative of a malicious SEO or content distribution scheme. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, but the presence of numerous external links strongly suggests a malicious intent to redirect the user to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8843

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://www.kimnails.fr/index.php?article=1591.3&nctrj=3&pdf=1591
    • http://www.cmpartners.com.au/index.php?article=427.1&vhbyw=1&pdf=427
    • http://duclasport.com/index.php?article=906.3&tglnr=3&pdf=906
    • http://www.kimnails.fr/index.php?article=1107.3&nctrj=3&pdf=1107
    • http://irioncotxgenweb.org/index.php?article=1462.3&qxjvs=3&pdf=1462
    • http://www.kimnails.fr/index.php?article=767.3&nctrj=3&pdf=767
    • http://www.tamayouz.net/index.php?article=1316.1&vexwv=1&pdf=1316
    • http://maconinjurylawyer.co/index.php?article=543.2&zjiqi=2&pdf=543
    • http://academiaoscarfernandez.com/index.php?article=1403.6&wruvc=6&pdf=1403
    • http://www.kimnails.fr/index.php?article=1043.3&nctrj=3&pdf=1043
    • http://www.kimnails.fr/index.php?article=1500.3&nctrj=3&pdf=1500
    • http://www.kimnails.fr/index.php?article=614.3&nctrj=3&pdf=614
    • http://dmrranch.com/index.php?article=84.3&qasjf=3&pdf=84
    • http://www.kimnails.fr/index.php?article=118.3&nctrj=3&pdf=118
    • http://romainboyet.com/index.php?article=758.3&wisdp=3&pdf=758
    • http://www.kimnails.fr/index.php?article=1062.3&nctrj=3&pdf=1062
    • http://ilkeyapi.com.tr/index.php?article=1680.3&cusnw=3&pdf=1680

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