Malicious PDF — malware analysis report

Static analysis result for SHA-256 821a7dd275000adc…

MALICIOUS

PDF

184.3 KB Created: 2015-08-05 14:09:36 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9766fbce21c2e2afac954522cea7d86a SHA-1: faf2dfad5de5a292d51b1b522654c7c7b18cf84b SHA-256: 821a7dd275000adcc810ea1e0b91fcf76784593c2f132474a2b38b32c19643bf
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a malicious intent.

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-8788010-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8788010-0
  • 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%B3%D1%82%D0%B0+%D1%81%D0%B0%D0%BD+%D0%B0%D0%BD%D0%B4%D1%80%D0%B5%D0%B0%D1%81+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+%D0%BA%D0%BE%D0%B4%D1%8B&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304928_maynkraft_kreativ_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304547_prikaz_o_vstuplenii_v_dolzhnost_generalnogo_direktora_obrazec.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304689_skachat_vindovs_7_maksimalnuyy_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000240cd.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x240CD 3556 bytes
font_01_sfnt_off00024e50.bin
36482f2ef6b2fc69a900da9af43cd689bfc65eb533a302f7ba3525b159b86aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E50 14232 bytes
font_02_sfnt_off00027b36.bin
dde8cb3db78f49492d397de1013a074ab9c596bc0508faa33f94bd64189db0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B36 14468 bytes
font_03_sfnt_off0002a5e9.bin
85d9f21e5262ac72fbd0b24f1654ba1103559bf302da9e34e929c6d11bef7195		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5E9 6184 bytes
font_04_sfnt_off0002b746.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B746 6084 bytes
font_05_sfnt_off0002c6db.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6DB 3752 bytes

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