Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc4b13873afa3dc5…

MALICIOUS

PDF

351.0 KB Created: 2015-08-19 13:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1ed18ffa7403e89aab9deb7a8f70fde8 SHA-1: 926700a1b3ac60546211ae98f17bd6a02f5bc173 SHA-256: cc4b13873afa3dc522c8c2c6c86e262401ff2d809e5465967ec247ba4fe09a04
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link and a high ML classifier score. ClamAV also identified it as Pdf.Dropper.Agent-7621073-0. The embedded URL points to botcraftman.ru, which is associated with malicious redirector infrastructure. The document body appears to be corrupted or obfuscated, preventing a clear understanding of its content, but the presence of the malicious link is sufficient evidence of malicious intent.

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-7621073-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7621073-0
  • 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=Crystal+tv+%D0%BA%D0%BE%D0%B4+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D0%B8+%D0%BA%D0%B0%D0%BD%D0%B0%D0%BB%D0%BE%D0%B2+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626440_chitat_onlayn_hroniki_razdolbaya_2_spor_na_balu_volanda.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626599_skachat_gta_san_andreas_na_android_bez_kesha_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626470_karta_abhazii_dlya_navitel_nm7_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000530cd.bin
21fadf70d70c528d920358d55892250e43e36fe935f651f7a4cd115fc46635b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x530CD 10516 bytes
font_01_sfnt_off00054e19.bin
551aeaa07944eb375b271ca31ed5cf5eff616601e7dd946ef5ef5ff68df7e9a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E19 15032 bytes

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