Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4bb2f31458af6df…

MALICIOUS

PDF

185.1 KB Created: 2015-07-25 15:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 31cba3425b037af57adcc3fa06f4b401 SHA-1: 05a02a6094328e73b8a4b4ae68412525f434af4e SHA-256: a4bb2f31458af6df795c2f331e921ea84f33fe29f102b10edae7101c59356459
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru. This indicates a likely phishing or malware delivery attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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%A4%D0%B0%D0%B9%D0%BB+ubiorbitapi+r2+loaderdll+%D0%B4%D0%BB%D1%8F+assassins+creed+3&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4206/4206565_skachat_cheat_crystals_v40_na_tanki_onlayn.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192119_skachat_krasivuye_ramki_dlya_word_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193575_kniga_50_ottenkov_serogo_skachat_besplatno_fb2.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a534.bin
3c9376ccb57923c1c7d2c132e3a2a0fe7c5eae3886d947d399345cc00fd87899		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A534 7328 bytes
font_00_sfnt_off00023e1a.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E1A 3556 bytes
font_01_sfnt_off00024b9d.bin
a2b44f840d82f1949217652917498cb6500e6c3480b5497f80904df8f4f42737		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B9D 14960 bytes
font_02_sfnt_off000279ce.bin
e82db0869cae68ee985bfa9cdd06a7d14e1988444d4a1c43b7769c350efae78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279CE 14712 bytes
font_04_sfnt_off0002babc.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BABC 6084 bytes
font_05_sfnt_off0002ca51.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA51 3752 bytes

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