Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b4dfca5e2fb3f…

MALICIOUS

PDF

185.7 KB Created: 2015-07-24 23:12:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e2a018e189b3600d0aa3d4f64077a4e4 SHA-1: de4a5283b1538007dff00a5ff9ead21799523276 SHA-256: eb1b4dfca5e2fb3fbbfc4aa602183d2d683b258be421acafbe8aaf04f55f8d4c
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The primary IOC is the malicious URL embedded within the document, which is likely used to redirect users to a phishing or malware distribution 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-7495029-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7495029-0
  • 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%BF%D1%80%D0%BE%D0%B1%D0%BD%D1%8B%D0%B9+%D0%B2%D0%B0%D1%80%D0%B8%D0%B0%D0%BD%D1%82+%D0%B5%D0%B3%D1%8D+%D0%BF%D0%BE+%D1%84%D0%B8%D0%B7%D0%B8%D0%BA%D0%B5+2015&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193250_gost_electro_for_visio_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186402_nabokov_lolita_audiokniga_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192973_directx_11_skachat_dlya_windows_7_32_bit_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023f7c.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23F7C 3556 bytes
font_01_sfnt_off00024cff.bin
2697234896386bfb543bf6ea96a34a929b208c34f207864efc28fccec0cffd40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24CFF 15232 bytes
font_02_sfnt_off00027cb6.bin
d129b2306b70ce91da7e21aa5dc95ff0e57120c5b3b157257a57119c7bcd55f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CB6 14640 bytes
font_03_sfnt_off0002a7ef.bin
ab580c0c0307d7a57971f7335092e63bd55f0b95fbbce8241097ef2594343874		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A7EF 7204 bytes
font_04_sfnt_off0002bcdf.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCDF 6084 bytes
font_05_sfnt_off0002cc74.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC74 3752 bytes

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