Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efc557e6f3b05ff…

MALICIOUS

PDF

184.8 KB Created: 2015-07-24 09:16:04 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 342b0476ec650126c0b2f6e59c952186 SHA-1: 00d62ff8469bc0c1435b6c4e83af8ce5ca0242a0 SHA-256: 4efc557e6f3b05ffd0834dc5ac8da34e1ce2da2950ec322025a0f12bac6b6e62
90 Risk Score

Malware Insights

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

The PDF 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 truncated, limiting further analysis of the specific lure.

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=%D0%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B8%D0%BD%D1%82%D0%B5%D1%80%D0%BD%D0%B5%D1%82+%D1%86%D0%B5%D0%BD%D1%82%D1%80+%D0%BA%D0%B8%D0%B5%D0%B2%D1%81%D1%82%D0%B0%D1%80&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184989_skachat_igru_bratc_realnuye_devchonki_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185353_mashinuy_dlya_gta_4_s_avtomaticheskoy_ustanovkoy.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187050_black_ink_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002431c.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2431C 3556 bytes
font_01_sfnt_off0002509f.bin
246bfe5da6611281009adcebdc49ac1636b80c310337a9d1bc553202e6e3fa2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2509F 14260 bytes
font_02_sfnt_off00027cf4.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CF4 14468 bytes
font_03_sfnt_off0002a7a6.bin
db969376d8e937494e2dc21f07c617bd77c21c53c975b71691fd3efc934e3bce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7A6 6296 bytes
font_04_sfnt_off0002b96a.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B96A 6084 bytes
font_05_sfnt_off0002c8ff.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8FF 3752 bytes

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