Malicious PDF — malware analysis report

Static analysis result for SHA-256 7deb0089790a3159…

MALICIOUS

PDF

341.1 KB Created: 2015-08-23 12:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f823a1cfe42441e74e6e71862f1bb232 SHA-1: 8ee0a411a5f0a3013a2d2ffcbeca44a543bdd721 SHA-256: 7deb0089790a3159ea99f10ca2caf8a9c1d23d22d1156237b87b11e62c54f950
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link identified as a malicious redirector. The ML classifier also flagged the document with high confidence. The presence of this link suggests an attempt to lure the user to a malicious site, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitated the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 2

  • 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 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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B3%D1%82%D0%B0+4+%D0%BA%D0%B0%D0%B2%D0%BA%D0%B0%D0%B7+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4684/4684527_igra_dostat_soseda_na_nokia_5228.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4684/4684788_kod_dlya_domofona_forvard.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4683/4683632_klyuchi_dlya_kis_2013_skachat_besplatno_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050f84.bin
b7107673732f8735396377e29503f415f7bbf9ef6f8d756161abe40fbc2b03f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50F84 8440 bytes
font_01_sfnt_off00052842.bin
37f28ca59a4980c27c6454e7d3fdc53824803a1d1e3b4532e4ed0193d0a5e526		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52842 14128 bytes

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