Malicious PDF — malware analysis report

Static analysis result for SHA-256 919f31ebcbe96f6b…

MALICIOUS

PDF

186.2 KB Created: 2015-07-24 13:45:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: adcf77f34f3fd7a210e3ee7e2899e706 SHA-1: 053d6dd18283a02be08aa27619f3748383cce01b SHA-256: 919f31ebcbe96f6b2ad867b12d8d28a0dd19adf35acacc508a761f1729d25680
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, but the presence of the malicious link strongly suggests a phishing or malware delivery attempt.

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%9F%D0%BE%D1%80%D1%82%D1%84%D0%BE%D0%BB%D0%B8%D0%BE+%D1%83%D1%87%D0%B5%D0%BD%D0%B8%D0%BA%D0%B0+1+%D0%BA%D0%BB%D0%B0%D1%81%D1%81%D0%B0+%D1%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD%D1%8B+word&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187376_skachat_moduy_na_fermer_simulyator_2015_besplatno_na_tehniku.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191451_aida64_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184494_skachat_mortal_kombat_9_na_pc_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024407.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24407 3556 bytes
font_01_sfnt_off0002518a.bin
08a5fb1d0a7ae125c6ddb40f7752c967318075cbcbb48307a236839cd55a439f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2518A 14760 bytes
font_02_sfnt_off00027f65.bin
05af0324ea53dbeb70af3f95799cdeab0996b5771b4b63dbada9bb03e1f03e1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F65 14596 bytes
font_03_sfnt_off0002aa72.bin
568563fb0a57fd454fa4cfdeeea2ad3a440a941f73f15ae1467b44c6de45673c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AA72 7088 bytes
font_04_sfnt_off0002bf1b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF1B 6084 bytes
font_05_sfnt_off0002ceb0.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEB0 3752 bytes

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