Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da144c4379a0570…

MALICIOUS

PDF

185.4 KB Created: 2015-07-25 01:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e8efe8cd3851495adb07356ff02fc803 SHA-1: aa23d60dbac5a3f5c7a088764da9e88cb21adee3 SHA-256: 1da144c4379a05709e4b1804a5f2fa1aeb9732bcea6c2f21095fb75216de2274
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the primary malicious behavior is the embedded malicious URL.

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-7493773-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7493773-0
  • 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%9E%D0%B1%D1%89%D0%B5%D1%81%D1%82%D0%B2%D0%BE%D0%B7%D0%BD%D0%B0%D0%BD%D0%B8%D0%B5+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D0%B5%D1%82%D1%80%D1%83%D0%BD%D0%B8%D0%BD&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186592_sia_1000_forms_of_fear_skachat_albom.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190981_yeroticheskie_kvestuy_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187170_rukovodstvo_po_remontu_honda_srv.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024137.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24137 3556 bytes
font_01_sfnt_off00024eba.bin
7f87fabdddf6c9f392f0b5d133d84af8fcfc6f6975cc6641c11dd1bafd1e6b6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24EBA 15128 bytes
font_02_sfnt_off00027d7d.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D7D 14468 bytes
font_03_sfnt_off0002a82f.bin
f3863f5ccf2e85dee5181f6d78c3550e5263a80c982a648d8afb117de9dde67d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A82F 6828 bytes
font_04_sfnt_off0002bbc7.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBC7 6084 bytes
font_05_sfnt_off0002cb5c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB5C 3752 bytes

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