Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a47bac2724b6eb9…

MALICIOUS

PDF

351.4 KB Created: 2015-08-22 09:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 65c26c1c2a2c3dbad8169d159079a192 SHA-1: 4773b3872550f0b2e80498af791bfde8466940fa SHA-256: 6a47bac2724b6eb9d133adfc4edba7895b09a6632b3bbe2d280ac6d88c69084c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure at http://botcraftman.ru/. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and the malicious URL suggest it's designed to lure the user to a compromised site, likely to initiate a download or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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-9021905-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9021905-0
  • 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%B4%D1%81%D1%82%D1%83+3781-98+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674586_skachat_serial_igra_prestolov_3_sezon_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674487_bonus_kod_world_of_tanks_2015_na_noyabr.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674525_apachiiskyhair_v_1_5_full_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005311a.bin
4c78657000cec1ead397085aa8fed4d1578b9b981f672262bae96fe65596b9b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5311A 9004 bytes
font_01_sfnt_off000549f6.bin
82dcdb825dbe2fd4dbf2a458bd53397f7d823f1bd654cb6545b6be74ecf4686d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549F6 17348 bytes

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