Malicious PDF — malware analysis report

Static analysis result for SHA-256 f738ecfbe8f5817f…

MALICIOUS

PDF

183.0 KB Created: 2015-07-25 02:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9ca4775da64141bc0942d0fe3dddbc1b SHA-1: b7b316851de99058c25ad1d6453aa09a5074e9a8 SHA-256: f738ecfbe8f5817f2ecbd500cc1712591655efe35db94bdb0e06a265ba9ea3c8
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing 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 associated with malicious redirectors. No scripts were extracted, and the document body was heavily truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 2

  • 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.
  • 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%91%D0%B5%D0%BA+%D0%B1%D0%BE%D1%80%D0%B1%D0%B8%D0%B5%D0%B2+%D1%8B%D1%80%D0%BB%D0%B0%D1%80%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189746_kod_aktivacii_dlya_ufc_undisputed_2015_pc_version.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189637_itogovuye_testuy_po_russkomu_yazuyku_4_klass_s_otvetami_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190828_gita_ayengar_yoga_dlya_zhenschin_skachat_pdf.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023b05.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23B05 3556 bytes
font_01_sfnt_off00024888.bin
af4970bcb35e7b8275994bedba484a8b9bb271869cfe7366033cecc315d1658c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24888 14276 bytes
font_02_sfnt_off000275ac.bin
163142455a5560a1f6759d0ead96de5f50a47653c77b96353ea21901cf90e8c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x275AC 14468 bytes
font_03_sfnt_off0002a060.bin
ffdd75bcd33ca24fabea0e1846dae4b129a857f3ab69c61d301ce1248325ab9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A060 6348 bytes
font_04_sfnt_off0002b23b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B23B 6084 bytes
font_05_sfnt_off0002c1d0.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C1D0 3752 bytes

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