Malicious PDF — malware analysis report

Static analysis result for SHA-256 e849ef90e966b953…

MALICIOUS

PDF

185.3 KB Created: 2015-07-23 20:58:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d6fa136c6d89ca72add243954ca0eb9b SHA-1: 145375a07f2fc00b48307531080596d0b292b82b SHA-256: e849ef90e966b9535142e9ec4fd287c2e9f6263ee3929a63c55947d1bff8a03a
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a known malicious redirector. No scripts were extracted from this sample, but the presence of a malicious link suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8790215-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8790215-0
  • 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%B1%D0%B0%D0%B7%D0%B0+%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D1%85+%D0%BC%D1%82%D1%81+2013+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184696_skachat_upl_dlya_pes_2015_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184741_skachat_programmu_dlya_nakrutki_lyudey_v_gruppu_vkontakte.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184682_new_roundup_4_teacher_s_book_skachat_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000241b0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x241B0 3556 bytes
font_01_sfnt_off00024f33.bin
89be1deb679579224748717c5075e6974ef9e99b776c5e94125480afef7ec6c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F33 14872 bytes
font_02_sfnt_off00027d29.bin
380ce7529b7c259d46fb99862e753bdfe29d18c6e606a7eccbd8e4ff6d33f16f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D29 14532 bytes
font_03_sfnt_off0002a81a.bin
5e553cfb869a14686ffd74b3c977e27d2510100ac8881f5d6f079166ab4bc2d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A81A 6724 bytes
font_04_sfnt_off0002bb79.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB79 6084 bytes
font_05_sfnt_off0002cb0e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB0E 3752 bytes

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