Malicious PDF — malware analysis report

Static analysis result for SHA-256 81047d0410fe9fbd…

MALICIOUS

PDF

186.8 KB Created: 2015-08-05 13:45:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e96532b62150ff7b4d4ac49ae6be92ad SHA-1: 9a199a7340bd591c4d4eee6e4a1cf00f21ed459e SHA-256: 81047d0410fe9fbd5164567d45a46c551000d2283b431f3883beefb681a130a2
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is indicative of a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. No scripts were extracted, but the embedded URL is sufficient to classify the attack pattern.

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-8788065-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8788065-0
  • 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%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+152+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304587_kryak_na_football_manager_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304559_zune__nokia_lumia_800__.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304638_kommercheskoe_predlozhenie_o_sotrudnichestve_obrazec_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024754.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24754 3556 bytes
font_01_sfnt_off000254d7.bin
84dd8624b168914ab33eb7de1693ed733eec951ce5c118f0138cc78bfe4eacd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254D7 14600 bytes
font_02_sfnt_off00028225.bin
9843d5a9e218b6d5d2da69f2456357b5cbce49777327aace166e58ad7a1af13c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28225 14640 bytes
font_03_sfnt_off0002ad56.bin
60525326e5621a335739c90082bfd94023ef85383e007d172cfd563996b07b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD56 6896 bytes
font_04_sfnt_off0002c15d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C15D 6084 bytes
font_05_sfnt_off0002d0f2.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0F2 3752 bytes

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