Malicious PDF — malware analysis report

Static analysis result for SHA-256 101831bc5c274e2b…

MALICIOUS

PDF

188.2 KB Created: 2015-07-24 08:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d8260eb555e9bd8615573ce743b22fb7 SHA-1: c7c2e7479464554d6f0d7991026bf05256d64428 SHA-256: 101831bc5c274e2bb126d91176df647d5cc034666ae96ec8b4e977465120a5a4
152 Risk Score

Malware Insights

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

The file is identified as a malicious PDF dropper by ClamAV and an ML classifier. It contains an embedded URL pointing to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The PDF structure and embedded content suggest it's designed to exploit vulnerabilities or trick users into navigating to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-8785612-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8785612-0
  • 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%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B0%D0%BD%D1%82%D0%B8%D0%B1%D0%B0%D0%BD+%D0%B4%D0%BB%D1%8F+%D0%B2%D0%B0%D1%80%D1%84%D0%B5%D0%B9%D1%81+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B1%D0%B5%D0%B7+%D1%81%D0%BC%D1%81+%D0%B8+%D1%80%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B0%D1%86%D0%B8%D0%B8&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189643_raspisanie_avtobusov_severodvinsk_arhangelsk_133.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185327_skachat_gta_san_andreas___multipleer_03z.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187956_shema_ruynka_sadovod_po_liniyam.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_off00024b33.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B33 3556 bytes
font_01_sfnt_off000258b6.bin
d42eb8660721618232cd57313f36c4470f8f2c9ae93c8ecaa4f11cf868242f01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x258B6 14604 bytes
font_02_sfnt_off00028680.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28680 14468 bytes
font_03_sfnt_off0002b132.bin
b930d9057f380813e35184ddf6e2fd6a80bf6f968a1c2b8a2b49bd62565e59dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B132 7420 bytes
font_04_sfnt_off0002c6eb.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C6EB 6084 bytes
font_05_sfnt_off0002d680.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D680 3752 bytes

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