Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f430dd33e13885…

MALICIOUS

PDF

185.1 KB Created: 2015-07-25 09:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 7b83f4d9fe83337e5a1ead99fb34c4b6 SHA-1: a57bd2186046acb33b64392e8f8e995f5b555e99 SHA-256: 72f430dd33e13885f68a6b30c4829379a94e01789563117edf4e715090910b91
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to serve a secondary payload or initiate a phishing attack. The file's metadata indicates it was generated by wkhtmltopdf, a tool sometimes abused to create malicious PDFs.

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-8787709-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8787709-0
  • 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=sigma+bc+812+%D0%B8%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185282_hidesoft_net_vkracker_6_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191741_whatsapp_dlya_nokia_x2_00_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4197/4197556_gta_san_andreas_kriminalnaya_rossiya_beta_2.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_off00023c5f.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C5F 3556 bytes
font_01_sfnt_off000249e2.bin
4042c2f071b3a0bded568e663224a2d512ac28861dba4d3071848d3345e0dc13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249E2 15280 bytes
font_02_sfnt_off000278c1.bin
27f69eb8c3e82f34e938a70a9c6ba4a9e7c1fe711f87625a162f0afc0491d34a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x278C1 14976 bytes
font_03_sfnt_off0002a4f1.bin
60d942bd830dda883502064fe4686eb16e45c5a91264e1adcd00d683fb1b0b86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4F1 7416 bytes
font_04_sfnt_off0002baad.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAAD 6084 bytes
font_05_sfnt_off0002ca42.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA42 3752 bytes

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