Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1814ab4d2219f33…

MALICIOUS

PDF

184.4 KB Created: 2015-07-24 03:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a18e06d3fd8fb2d98ee8c1f28aa732bc SHA-1: 5587971640dbb77b82685de75e3aa7e397e5be2e SHA-256: b1814ab4d2219f3381bd675a89c62f7bd9d4c53cb8f7561bf6e0d44f813a7944
98 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1566.002 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier with high confidence and contains embedded JavaScript. Crucially, it includes a link to a known malicious redirector infrastructure, http://botcraftman.ru/, which is likely the primary mechanism for delivering a subsequent payload or phishing content. The presence of embedded JS and the malicious URL strongly suggest an attempt to compromise the user through redirection.

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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%B7%D0%B0%D0%B4%D0%B0%D0%BD%D0%B8%D1%8F+%D0%BF%D0%BE+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5+5+%D0%BA%D0%BB%D0%B0%D1%81%D1%81&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185511_chituy_na_suyr_v_transformays.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185067_menedzher_sto_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185501_akt_revizii_v_magazine_obrazec_skachat_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023e79.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E79 3556 bytes
font_01_sfnt_off00024bfc.bin
d6eaa3d4b7ad2853e6a2c766151c1c7c18c22789cc0cb2e20d7978a9f880e61a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24BFC 14368 bytes
font_02_sfnt_off00027914.bin
038758d791353b698a076cf989ee49bcc9fdc620bdae571ec4dd76128346e4f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27914 14900 bytes
font_03_sfnt_off0002a4ff.bin
4b7cccc1b3712ff4dc792bb00a216583ca962cdf7ff98bab379ec7830054ec84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4FF 6528 bytes
font_04_sfnt_off0002b79b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B79B 6084 bytes
font_05_sfnt_off0002c730.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C730 3752 bytes

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