Malicious PDF — malware analysis report

Static analysis result for SHA-256 efd22af97afacdd2…

MALICIOUS

PDF

186.4 KB Created: 2015-08-08 09:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2ce09d1712b5ad589232e082d90daac4 SHA-1: 598de2ba7c3527b8ff3dc19e2ff51e96d1569e8e SHA-256: efd22af97afacdd217798e31d3cff0e4047cc08c261f1f0751263f4b26191bdc
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical alert for a redirector link to botcraftman.ru. The ML classifier also assigned a high probability of maliciousness. This indicates the PDF's primary function is to redirect the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-7622137-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7622137-0
  • 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%B3%D0%BE%D0%BB%D1%8B%D0%B5+%D0%BA%D1%80%D0%B0%D1%81%D0%B8%D0%B2%D1%8B%D0%B5+%D0%B6%D0%BE%D0%BF%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383704_skachat_vindovs_81_64_bit_2014_besplatno_na_russkom_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383955_skachat_programmu_na_dengi_tdp4.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383854_flagi_v_hudozhestvennoy_literature.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024729.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24729 3556 bytes
font_01_sfnt_off000254ac.bin
6675b4710901333a007eb867c384b0bd4ab2efaa9571f8bad887357570bd6eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254AC 14752 bytes
font_02_sfnt_off00028308.bin
b79d56b22a3d37edc4793e81e28af2d51416733c1decb699be69ae0b1e9dff38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28308 14468 bytes
font_03_sfnt_off0002adb7.bin
a32f6d1948eca01739e8d769bbdca9e95a36bce8260da303803bc1bc9dec20d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADB7 6436 bytes
font_04_sfnt_off0002bfe3.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFE3 6084 bytes
font_05_sfnt_off0002cf78.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF78 3752 bytes

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