Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a490b61055ad046…

MALICIOUS

PDF

185.4 KB Created: 2015-07-25 03:24:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 20bbdb85deab46cfd0b82b66ce4dc525 SHA-1: ef726cf4f071bdf6984037c3058e8c0839daf70c SHA-256: 4a490b61055ad046a4363882155241922e7b7a64116bc2a7478d262b147afb58
92 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.

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=%D1%81%D0%BA%D0%B0%D0%B9%D0%BF+%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%B4%D0%BB%D1%8F+%D0%B2%D0%B8%D0%BD%D0%B4%D0%BE%D0%B2%D1%81+7&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4198/4198856_skachat_sbornik_igr_ot_alavar_2014_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193220_porno_10_letnie_devochki.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184914_pravila_belorusskogo_yazuyka_v_tablicah.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000242d1.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x242D1 3556 bytes
font_01_sfnt_off00025054.bin
d72b129e9200b6bb0da309a1b59d3738a1abbc9081e3f3bd62684816da6a0187		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25054 14212 bytes
font_02_sfnt_off00027d03.bin
61d14ba452ff6e0dc179888c2f398a787bbab14a9cc52f92372d80655ecc5ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D03 14512 bytes
font_03_sfnt_off0002a7e6.bin
3eb4272a66ed493eacecf3653f54d924a973caf3aaec1f843d6b00f78c97519f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7E6 6900 bytes
font_04_sfnt_off0002bbbf.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBBF 6084 bytes
font_05_sfnt_off0002cb54.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB54 3752 bytes

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