Malicious PDF — malware analysis report

Static analysis result for SHA-256 792a922788620332…

MALICIOUS

PDF

345.9 KB Created: 2015-08-11 22:13:05 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 08b12ae0d1c51e605bdb50e93a2f3d10 SHA-1: ed1eddcb45122d5a6992869df9b008d7ca3198fa SHA-256: 792a9227886203326cee17955d214ffde8d825e9a497d92e8bca29db393fd564
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a malicious redirector. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient to infer a phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 2

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://botcraftman.ru/?lip&keyword=%D0%B0%D0%BA%D1%82+%D0%BF%D1%80%D0%B8%D0%B5%D0%BC%D0%B0-%D0%BF%D0%B5%D1%80%D0%B5%D0%B4%D0%B0%D1%87%D0%B8+%D1%82%D0%BC%D1%86+%D0%B1%D0%BB%D0%B0%D0%BD%D0%BA+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4407/4407407_chituy_dlya_cod4_multiplayer.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4429/4429941_v_kontakte_chituy.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4457/4457413_flakboy_2_chituy.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000526c1.bin
db133a476833624488503692dae1fb3c2e6d8a03ae1e3711877d707f330bd9df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526C1 6656 bytes
font_01_sfnt_off00053aad.bin
829e38999c6250fa55a8fe5ba51ba6eb31efaea2cf453bbcb4fc409e10ad93df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53AAD 15108 bytes

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