Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b692f2887a842e9…

MALICIOUS

PDF

186.4 KB Created: 2015-07-23 20:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 11107b4212343902bdcae9b959be56c9 SHA-1: 763d6be3536f580a12df4e69a0721f2fcea38ec9 SHA-256: 3b692f2887a842e941c3b674182fa4c4910410abac115444d004fb3e6835bc9b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical finding for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to a known malicious domain, indicating the document's primary purpose is to lure users to a harmful site.

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-7493907-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7493907-0
  • 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=New+round-up+4+teacher+s+book+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%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/5//4184/4184434_reshenie_zadach_s5_po_himii.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184351_samouchitel_excel_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184553_skachat_zvuk_indyuka.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a8d1.bin
79a35aee4d2855c389279004b039eb4ae282be257f8f98a345e56039ee0db9cd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A8D1 7796 bytes
font_00_sfnt_off00024119.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24119 3556 bytes
font_01_sfnt_off00024e9c.bin
53566ac0cfad3e1792d35b47826ecc12ef1bdae6856d6de2ad2eef52da4300d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E9C 15020 bytes
font_02_sfnt_off00027cd9.bin
80040a283328fc4c0591d62632077022be7738623d3bb307453991c4f1b64926		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CD9 14936 bytes
font_04_sfnt_off0002bff2.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFF2 6084 bytes
font_05_sfnt_off0002cf87.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF87 3752 bytes

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