Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac124bbb1888f398…

MALICIOUS

PDF

186.5 KB Created: 2015-07-24 13:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f46da832c01998a930351f635f23e821 SHA-1: 38747d01941187474dc42e4e379d0b402f76abaa SHA-256: ac124bbb1888f39813f03ec6dc44d4e0310f09cc6ec7da8d4523f577c00e883d
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, http://botcraftman.ru/. This heuristic, combined with ML classification and ClamAV detection, strongly indicates malicious intent. The embedded URL is likely used to deliver a second-stage payload or redirect the user to a phishing site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8789044-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8789044-0
  • 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%B3%D1%80%D1%83+%D0%B4%D0%B0%D0%BB%D1%8C%D0%BD%D0%BE%D0%B1%D0%BE%D0%B9%D1%89%D0%B8%D0%BA%D0%B8+%D0%BA%D0%B0%D0%BC%D0%B0%D0%B7+6460+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184507_age_of_empires_4_skachat_besplatno_russkaya_versiya_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188770_skachat_fotoredaktor_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186887_russkiy_rok_luchshee_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000244c2.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244C2 3556 bytes
font_01_sfnt_off00025245.bin
8aa8cf68f9cf4e233b3a85a5ed4a10ac637cc136f6e31258f4a80e9a50ce78c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25245 14624 bytes
font_02_sfnt_off00028078.bin
5b31b7b65231ff27bb17319a1552000e25cedec25446c2c8af50fce1567a95d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28078 14468 bytes
font_03_sfnt_off0002ab2e.bin
11bfd8cc61a04119567c1ef83539dc00c39417bb552c26fe2de6c772b489ece6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AB2E 7220 bytes
font_04_sfnt_off0002c040.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C040 6084 bytes
font_05_sfnt_off0002cfd5.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFD5 3752 bytes

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