Malicious PDF — malware analysis report

Static analysis result for SHA-256 31f41a5a9cc688e5…

MALICIOUS

PDF

187.6 KB Created: 2015-07-24 13:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f97b1b966ed356893f013833f6894492 SHA-1: 9dc8475af670c153d261cdfcc4b0ca72f01984f8 SHA-256: 31f41a5a9cc688e5b145f37fd8ebdca4d1b4132098c1202b3dbc1831d3ed5d61
150 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics, including a critical alert for a link to known malicious redirector infrastructure. The ClamAV detection further supports this, identifying it as Pdf.Dropper.Agent-8790915-0. The primary malicious indicator is the embedded URL, which likely serves as a lure to a phishing or malware distribution site.

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-8790915-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8790915-0
  • 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%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+152+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D0%BC%D0%B5%D0%B4%D0%B8%D0%B0+%D0%B3%D0%B5%D1%82+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191102_prilozhenie_vkontakte_dlya_kompyutera_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192256_katalog_sovetskogo_farfora_1917_1991.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187600_test_drive_unlimited_2_trener_v017_build_7.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002483e.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2483E 3556 bytes
font_01_sfnt_off000255c1.bin
3d92519c51a1e5280d4bdde7397399649aa7f6797cf48df00a99e2f22aff3b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x255C1 14588 bytes
font_02_sfnt_off000283b9.bin
d09923cbdc305950305c98b16fd731505617ef87fa48d967c0f3dc823af7b848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x283B9 14640 bytes
font_03_sfnt_off0002aeec.bin
7054d71249d2968a0ae3fc33822df24aab7e61a48d2d7b18e598fb95919b0fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEEC 7332 bytes
font_04_sfnt_off0002c479.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C479 6084 bytes
font_05_sfnt_off0002d40e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D40E 3752 bytes

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