Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87a585daf18052a…

MALICIOUS

PDF

187.8 KB Created: 2015-08-03 15:00:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c1efd3b809520dac077657f0af0dd35e SHA-1: 3747385c8957b2228b0210b56a52cd240aee6e28 SHA-256: d87a585daf18052a4fdd5aa1cdc64c40fb682a439420bfb0e3fdac543029639f
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 primary malicious IOC is the URL pointing to botcraftman.ru, which is likely used for phishing or malware distribution. No scripts were extracted, and the document body was truncated, limiting further analysis of the delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=whatsapp+%D0%B4%D0%BB%D1%8F+%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1%8E%D1%82%D0%B5%D1%80%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B1%D0%B5%D0%B7+%D1%80%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B0%D1%86%D0%B8%D0%B8&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4269/4269530_balda_skachat_na_kompyuter_na_russkom.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187077_infamous_second_son_na_pc_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4283/4283057_skachat_igru_cherez_torrent_unturned.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002af0a.bin
b920d87ebf11dc498d3323ec5f95a357da07e73bf29314c0f7ca84d8d0c0f0ac		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AF0A 7656 bytes
font_00_sfnt_off000247fd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x247FD 3556 bytes
font_01_sfnt_off00025580.bin
0ef59d83ae76506a60c405fc7e0458311ae97ce91b222e34c792bab6ed4924c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25580 14972 bytes
font_02_sfnt_off000283de.bin
9c203f1a5e72048ccb181a4caaa3f857e589323f460661e1147a6d5e59ee526e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283DE 14680 bytes
font_04_sfnt_off0002c593.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C593 6084 bytes
font_05_sfnt_off0002d528.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D528 3752 bytes

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