Malicious PDF — malware analysis report

Static analysis result for SHA-256 3967e64eb7450dc3…

MALICIOUS

PDF

44.4 KB Created: 2020-04-11 02:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9ab8670a1c67cbf672ee7c74d927e5c6 SHA-1: d0ad8170966bbfbf44c6ecd1cf42a59496a906b0 SHA-256: 3967e64eb7450dc35f1c64e5244de0e30aab4bd2cb49d0b1e84733615c0e6e0c
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a heuristic firing for a link farm, indicating a high volume of external links. One specific link is presented as 'frc 2019 update suite password', suggesting a social engineering lure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous suspicious URLs points to a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://davidmarquesibanez.com/uploads/1/3/1/4/131483118/131483118.html#frc+2019+update+suite+password
    • http://theemeraldstone.org/uploads/1/3/0/6/130620428/8027891.pdf
    • http://mhswarriorettes.com/uploads/1/3/0/2/130287937/vebopaduwobifos-vugixuru-sekemuxupesore-gisaw.pdf
    • http://bishophollymission.org/uploads/1/3/0/5/130542920/48693e57a6f8fd5.pdf
    • http://gemrosejewelry.com/uploads/1/3/0/6/130603682/1072391.pdf
    • http://clinchmtntrading.com/uploads/1/3/0/6/130639949/2c707efc936.pdf
    • http://remodelcostspreadsheet.com/uploads/1/3/0/8/130874299/99937f1.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e0f.bin
92ac425f0b9c17ed835c298842b9a1b56747fbc82a9c6f563aac09f90891e5c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0F 9220 bytes
font_01_sfnt_off00009112.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9112 16036 bytes

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