Malicious PDF — malware analysis report

Static analysis result for SHA-256 92741b3d5cdc0a97…

MALICIOUS

PDF

372.7 KB Created: 2015-08-20 08:39:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: dded41b4614deb4b212f9cf33f60fd56 SHA-1: 7c404e82aa4bea65ee0b0fe370de21ca9932bc1f SHA-256: 92741b3d5cdc0a9782fa4f88929e3b81f7e46008ea651aa400cb7ab295eb6634
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL http://botcraftman.ru/... is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download site. No scripts were extracted, and the document body was unreadable, but the presence of the malicious URL is sufficient for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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%BB%D0%B5%D0%B4%D0%BD%D0%B8%D0%BA%D0%BE%D0%B2%D1%8B%D0%B9+%D0%BF%D0%B5%D1%80%D0%B8%D0%BE%D0%B4+1+%D0%B8%D0%B3%D1%80%D0%B0+%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//4639/4639644_shablonuy_prezentaciy_s_yubileem_powerpoint.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639867_bonus_wallet_skachat_programmu_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639670_skachat_gta_san_andreas_dlya_vindovs_8.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058d37.bin
6c6145042afc61eaa5fecfb33d8121874ec08db87ebb349cd3f4233e5b757006		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58D37 8296 bytes
font_01_sfnt_off0005a502.bin
f88d2cb66cb71d5217ff77bcd9ce77baa7f004f79b1cc042af336f34378e00a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A502 15376 bytes

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