Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d571318470bdc04…

MALICIOUS

PDF

364.3 KB Created: 2015-08-24 00:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ba308252bbaae492d90e726fd1c5c981 SHA-1: e3e09f57c2df93c52a84330f9280a49096a16603 SHA-256: 7d571318470bdc04de9fec1f0f36236e7b9a175e8dbc03f1f12492ae66430b81
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector infrastructure, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of the malicious URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%80%D0%B0%D0%BC%D0%BA%D0%B8+%D0%B4%D0%BB%D1%8F+%D0%BF%D1%80%D0%B5%D0%B7%D0%B5%D0%BD%D1%82%D0%B0%D1%86%D0%B8%D0%B9+powerpoint+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693648_skachat__igru__stalker_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693435_skachat__igruy__cherez_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693771_igrat__v__vzruyv_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056a5d.bin
a63d552d41ec0d3be30f732e3b1af1720e4c1d6ae71d8dd0bd50d6c66a333052		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A5D 9424 bytes
font_01_sfnt_off0005841f.bin
13a66d7e568d234b1d9e28e7f9bfa47556014629ae1a0aadf300d4a483a514be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5841F 14928 bytes

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