Malicious PDF — malware analysis report

Static analysis result for SHA-256 636406f0f7747ec7…

MALICIOUS

PDF

391.6 KB Created: 2015-08-23 14:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b175e701cb94f29f9a99d21fecd7ad38 SHA-1: da6937c43f62f5c9f934075182fb6d4e9f65c443 SHA-256: 636406f0f7747ec73c01915e358114e22a5b228c41e0833bc547afd38b3e00d7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, disguised with keywords related to a popular game to entice clicks. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the presence of a malicious redirector suggests an attempt to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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=the+elder+scrolls+v+skyrim+legendary+edition+xbox+360+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4685/4685984_svadebnuye__yetiketki__na_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4686/4686038_rabochaya__programma__po_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4683/4683402_licenzionnuyy_klyuch_dlya_nero_12.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005cac7.bin
de686fba0b148c1651419ea73336a5989740a3022c942d6b8dd73fbb5f6c9108		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CAC7 11804 bytes
font_01_sfnt_off0005ea6d.bin
eee2d9cc1ae3d870409576fde78a63de581634126517b05150544978055e2aca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6D 17508 bytes

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