Malicious PDF — malware analysis report

Static analysis result for SHA-256 f936c7a87ce2f3e0…

MALICIOUS

PDF

187.2 KB Created: 2015-07-24 11:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e273f70a4585599a86acedbda73765de SHA-1: 5792e3887227d44d91917871c9225a11b047d91a SHA-256: f936c7a87ce2f3e03d0fe51e605e72784509e2dbced16fbe4066c72c3e7c379c
152 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by multiple heuristics, including a critical alert for a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF. The primary malicious indicator is the embedded URL pointing to http://botcraftman.ru/, which is classified as a malicious redirector. This suggests the document's purpose is to lure users to a compromised or malicious 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-8790609-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8790609-0
  • 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=%D1%81%D1%82%D0%B0%D0%BD%D0%B4%D0%B0%D1%80%D1%82%D0%BD%D1%8B%D0%B5+%D0%B8%D0%B3%D1%80%D1%8B+%D0%B4%D0%BB%D1%8F+windows+7+%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//4184/4184943_adobe_photoshop_cs5_skachat_torrent_russkaya_versiya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188189_skachat_igruy_cherez_torrent_cherepashki_nindzya_2013.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184415_chertezhi_samodelnuyh_shinnuyh_piloram.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ad23.bin
cbcda1d46d3177211ea25e09f3242ae65dc0557b6ae36cc18ef108a024ef3902		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AD23 7492 bytes
font_00_sfnt_off000245f5.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245F5 3556 bytes
font_01_sfnt_off00025378.bin
9b4176729f1fc90b8007afab4f835070ae3af284cb376e809dc0e44b4453f1cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25378 14936 bytes
font_02_sfnt_off00028202.bin
b4275ecc6fa3c107ec556107faec61dc0f5f904b6c1501e2d97eeeb8595fbf41		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28202 14584 bytes
font_04_sfnt_off0002c31d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C31D 6084 bytes
font_05_sfnt_off0002d2b2.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2B2 3752 bytes

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