Malicious PDF — malware analysis report

Static analysis result for SHA-256 823f3a1f4a84cfe0…

MALICIOUS

PDF

185.8 KB Created: 2015-08-08 09:58:23 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1b2dd74578bcf9664dabe4912f060f12 SHA-1: 0124a2c3614657448ba945d258b85566f44a12c6 SHA-256: 823f3a1f4a84cfe0da266e7033018b4a200e91e726d39dbb5f3a8eb8ea7c7f35
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. No scripts were extracted from this sample, but the presence of the malicious link strongly suggests a phishing or malware delivery attempt.

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-7621163-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7621163-0
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B0%D1%80%D0%B1%D0%B8+%D0%BF%D0%BE%D0%BA%D0%B0%D0%B7+%D0%BC%D0%BE%D0%B4+%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://img1.liveinternet.ru/images/attach/c/6//4383/4383713_skachat_brauzer_na_telefon_nokia_5228.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384340_skachat_smeshariki_besplatno_vse_serii.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383909_skachat_na_telefon_govoryaschego_kota.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000245c1.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245C1 3556 bytes
font_01_sfnt_off00025344.bin
2b15f4d028b35c5291baa7dafb69933e8e4f46deda97465771861f7804d758d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25344 14100 bytes
font_02_sfnt_off00027fa5.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27FA5 14468 bytes
font_03_sfnt_off0002aa57.bin
94d4017de314efebab26ec0ded734f6f789d2fe44ad423f491664620bfc0a9fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA57 6636 bytes
font_04_sfnt_off0002bd57.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD57 6084 bytes
font_05_sfnt_off0002ccec.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCEC 3752 bytes

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