Malicious PDF — malware analysis report

Static analysis result for SHA-256 4806278cbd12c649…

MALICIOUS

PDF

184.1 KB Created: 2015-07-27 05:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f98816bb8c52c020aeabef80daa0875c SHA-1: 007048069015d8a3fd1a944351fc534b4ccf5aac SHA-256: 4806278cbd12c6490f419a258c1983cfcd4a5313926c4d2fe8888bef58da76ae
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for a redirector link to botcraftman.ru. ClamAV also identified it as Pdf.Dropper.Agent-8786777-0. The ML classifier assigned a high probability of maliciousness. The embedded URL is the primary indicator of malicious intent, suggesting the PDF acts as a lure to a malicious 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-8786777-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8786777-0
  • 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%B8%D0%BA%D0%BE%D0%BD%D0%BA%D0%B8+64%D1%8564+ico+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4223/4223598_iptv.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4219/4219049_otvetuy_na_gosyekzamen_po_grazhdanskomu_pravu_v_aga.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4220/4220754_skachat_gta_4_na_kompyuter_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023eb9.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23EB9 3556 bytes
font_01_sfnt_off00024c3c.bin
9ef2cd91eb2bd088601712eea6ba68ea5749d1a36c61aee054805ad8712a0f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C3C 14380 bytes
font_02_sfnt_off00027974.bin
c75b7ccbe54afa2aedbd07f6e0360cec3c1c788b2c07a105c3a58fb4a91dc834		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27974 14532 bytes
font_03_sfnt_off0002a465.bin
e93484226938bb2091c1e6a9ea3b1600438253d79fe664ee215579b2f6e240c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A465 6440 bytes
font_04_sfnt_off0002b699.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B699 6084 bytes
font_05_sfnt_off0002c62e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C62E 3752 bytes

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