Malicious PDF — malware analysis report

Static analysis result for SHA-256 903264f3041e4c96…

MALICIOUS

PDF

187.7 KB Created: 2015-07-25 03:21:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f1c3781be5be8f4b8d595cce623aaf62 SHA-1: ce35414dd19ae4636aa54cb37c7e42afdde053ba SHA-256: 903264f3041e4c96c84fd541ab4fa5911fac763ec835027b30cc6067db25b737
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to deliver a secondary payload or conduct phishing. The ML classifier also strongly indicated maliciousness.

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-7628383-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7628383-0
  • 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%B2%D1%80%D0%B5%D0%BC%D1%8F+%D0%BF%D1%80%D0%B8%D0%BA%D0%BB%D1%8E%D1%87%D0%B5%D0%BD%D0%B8%D0%B9+%D0%B2%D1%81%D0%B5+%D1%81%D0%B5%D0%B7%D0%BE%D0%BD%D1%8B+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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//4192/4192151_bcad_mebel_pro_393_1100_russkiy_skachat_besplatno_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188600_stalker_ten_chernobuylya_povelitel_zonuy_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4197/4197051_segodnya_poigrayu_ya_v_maynkraft_tekst_pesni.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002491f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2491F 3556 bytes
font_01_sfnt_off000256a2.bin
b6e90615d700c347396b227b61e8fae468bd37578e4bb540f9cb6f6f5680e844		 pdf-font-stream PDF embedded font (sfnt) at offset 0x256A2 15268 bytes
font_02_sfnt_off00028564.bin
46ec519e62be714e7407e78cf89b1e7f242633b555de9106c954d1163c4578ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28564 14680 bytes
font_03_sfnt_off0002b02d.bin
5b1f436a8e78fe494e532fd122bb3b3fc4ac7e9eda2bbbc52ff2b61796c5232b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B02D 7172 bytes
font_04_sfnt_off0002c4e5.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4E5 6084 bytes
font_05_sfnt_off0002d47a.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D47A 3752 bytes

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