Malicious PDF — malware analysis report

Static analysis result for SHA-256 9192161b18e83b0d…

MALICIOUS

PDF

183.8 KB Created: 2015-08-08 13:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e721a12a8f75385db1ea3beb2ab946c0 SHA-1: 7af80db48c243c410d263c3355698120169ebc5b SHA-256: 9192161b18e83b0d0640e39b695259c2311ba7178bb6993bb498257f8a8d95b5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier and ClamAV detection further support its malicious nature, identifying it as Pdf.Dropper.Agent-7522364-0. The embedded URL is the highest priority IOC.

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-7522364-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7522364-0
  • 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=deep+exploration+65+%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://img1.liveinternet.ru/images/attach/c/6//4385/4385822_dnevniki_vampira_5_sezon_informaciya.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4389/4389818_notuy_dlya_fortepiano_nyusha.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4387/4387588_shema_regulyatora_napryazheniya_generatora.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023aee.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23AEE 3556 bytes
font_01_sfnt_off00024871.bin
02786b4cc364c6403841f19f2475363d6e59605fc09934c4d549ddf9aed3899a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24871 14748 bytes
font_02_sfnt_off00027620.bin
c4fae8f43f88e16c7f925a255ced59350c49d442586336987eff29c7859d5e85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27620 14956 bytes
font_03_sfnt_off0002a255.bin
d2386d7ca21a595f6b3694d35bb58e8d3a6a5138553c3e4dce23b568c278740c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A255 6728 bytes
font_04_sfnt_off0002b596.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B596 6084 bytes
font_05_sfnt_off0002c52b.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C52B 3752 bytes

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