Malicious PDF — malware analysis report

Static analysis result for SHA-256 6633f8a529d503ef…

MALICIOUS

PDF

186.7 KB Created: 2015-07-24 23:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cb93559f76ee653c90837d3c631632ba SHA-1: 126512a741231dfa62f27a9395c7413425d10cb7 SHA-256: 6633f8a529d503ef7ab628a39416f9b3cc69693c51910496dbd07ab2895534b0
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The embedded URL `http://botcraftman.ru/...` is highly suspicious and likely serves as a dropper for further malicious content. The ML classifier also strongly indicated maliciousness.

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-8787462-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8787462-0
  • 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%B0%D0%B2%D1%82%D0%BE%D0%BA%D0%B0%D0%B4+2013+%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+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186533_skachat_chit_na_point_blank_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186151_skachat_chit_na_kubezumie_2_v38.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185341_kostyum_rusalki_sims_2_skachat.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024665.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24665 3556 bytes
font_01_sfnt_off000253e8.bin
4ad7f54d12ef3179f195e7cd6c658f5155ae76bb06c32fca236c45901e05d91d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x253E8 14596 bytes
font_02_sfnt_off00028153.bin
bf452c5f5b8d4056dc93f92bde33b7cb60956ef4af3eaae674759af905e9025b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28153 14468 bytes
font_03_sfnt_off0002abff.bin
b903447f752396a2f2f4b26e3a3fb1fa97c9899eb113e36e781f54af1bb8d191		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABFF 7212 bytes
font_04_sfnt_off0002c128.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C128 6084 bytes
font_05_sfnt_off0002d0bd.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0BD 3752 bytes

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