Malicious PDF — malware analysis report

Static analysis result for SHA-256 438d798397988a5a…

MALICIOUS

PDF

11.9 KB Created: 2015-07-15 14:42:11 +04:00 Authoring application: DOMPDF
MD5: edf433173056169b12d2a70cfb0a6640 SHA-1: d0a29cd35c62a080b8cb3b593dafd4adf2d465f0 SHA-256: 438d798397988a5aeb23b86e15981d59874b9d6f7d5ff08fa79c5ee4df3d4ab0
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded URLs pointing to SEO-optimized websites. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass external link farm, suggesting a coordinated effort to drive traffic to these sites. The ML classifier also flagged the PDF as malicious. No scripts were extracted, and the document body content is largely obfuscated binary data with some text related to binary options trading, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8959

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://photo-file.ru/index.php?article=1107.1&wehsa=1&pdf=1107
    • http://topservices.co.il/index.php?article=60.1&xujqf=1&pdf=60
    • http://sennexdesign.com/index.php?article=2041.1&nonzs=1&pdf=2041
    • http://photo-file.ru/index.php?article=305.1&wehsa=1&pdf=305
    • http://vioval.eu/index.php?article=397.1&irrir=1&pdf=397
    • http://photo-file.ru/index.php?article=656.1&wehsa=1&pdf=656
    • http://barrainformativa.com/index.php?article=711.2&eyxlg=2&pdf=711
    • http://www.authenticness.com/index.php?article=1714.1&aqdto=1&pdf=1714
    • http://techaccesscorp.com/index.php?article=802.2&dupth=2&pdf=802
    • http://photo-file.ru/index.php?article=1379.1&wehsa=1&pdf=1379
    • http://photo-file.ru/index.php?article=2214.1&wehsa=1&pdf=2214
    • http://photo-file.ru/index.php?article=1908.1&wehsa=1&pdf=1908
    • http://www.mantrabeautybar.ca/index.php?article=1919.1&rukbv=1&pdf=1919
    • http://photo-file.ru/index.php?article=2263.1&wehsa=1&pdf=2263
    • http://synerte.eu/index.php?article=2010.1&gwbut=1&pdf=2010
    • http://photo-file.ru/index.php?article=1555.1&wehsa=1&pdf=1555
    • http://www.wslab.co/index.php?article=685.1&fvtfv=1&pdf=685

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