Malicious PDF — malware analysis report

Static analysis result for SHA-256 78a98ea788edb4c8…

MALICIOUS

PDF

348.8 KB Created: 2015-08-26 09:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a8fc9eb8063f0940c87409d3cc92474c SHA-1: 5a2281618f3590b128eaf2b4b45b93c80f0c2693 SHA-256: 78a98ea788edb4c8570543fa7d1fd82058a5e971c40dc190bcc917986c214a34
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, which is likely intended to trick the user into downloading malicious software. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicates this malicious intent. The ML classifier also flagged the document with high confidence. No scripts were extracted, but the presence of a malicious URL is sufficient to infer the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+driver+updater&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751617_windows__8_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751945_muy__yeto__louna_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751533_prikaz__ministra__oboronuy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052827.bin
161c42cf38720295d759d1e819bd4a03d245c87d34cc08056f0daa66e8bd7a68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52827 8512 bytes
font_01_sfnt_off00053fb0.bin
f7f6174a5601b4ac4ee855c85e3b9c783c9b77d69ae62e8e832feeb96cce92e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53FB0 17400 bytes

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