Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa627f1cbf00d78b…

MALICIOUS

PDF

366.3 KB Created: 2015-08-21 09:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 313c37dc336d5c88fac057e6da6e9e6d SHA-1: 14ce8ca5265ec24b57ea4b28445b845ad79042e4 SHA-256: aa627f1cbf00d78ba2ce773c1c15f21877ad1845138f29642132076cfd971ed8
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 distribution site. No scripts were extracted, and the document body was unreadable, but the presence of the malicious URL is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%B1%D0%B0%D0%B7%D0%B0+%D0%BF%D0%B0%D1%81%D0%BF%D0%BE%D1%80%D1%82%D0%BD%D1%8B%D1%85+%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D1%85+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654803_devushka_davit_krolika.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654788_skachat_vzlomannuyu_igru_boy_s_tenyu_2.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654697_ts4exe_skachat_dlya_sims_4.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056eff.bin
d0a5a6b9b40520f158218da37ad4aeafb5c8b1891b515184512fc6eb58cb0065		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56EFF 8360 bytes
font_01_sfnt_off0005875b.bin
7a052cef614bca5cc86de11b856d5357ff8959d259a418a0b21766b1bc6e5351		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5875B 16100 bytes

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