Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce61020f32ad91d1…

MALICIOUS

PDF

46.4 KB Created: 2020-04-15 08:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c2d85490ae4ad2a1ca262c0d51988524 SHA-1: e2b770d2134fddae960ebd81aba7a2850df21040 SHA-256: ce61020f32ad91d13d1b0adf1cc7c31d409e17d9ebda766985fa5b96e3f9b274
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which point to seemingly unrelated domains but follow a similar path structure, indicating a link farm or SEO abuse for malicious purposes. The document body, though heavily obfuscated, contains references to 'adobe audition presets' and 'wkhtmltopdf', suggesting a lure to download potentially malicious software or presets. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://blossomchildcare.org/uploads/1/3/0/9/130969678/130969678.html#the+adobe+audition+presets+v2.+0
    • http://colorsthatconvert.com/uploads/1/3/0/7/130776002/9856888.pdf
    • http://davidcarere.com/uploads/1/3/0/4/130483318/765f31.pdf
    • http://boydsoapsanddesigns.com/uploads/1/3/0/4/130475997/3830100.pdf
    • http://flavorsdepot.com/uploads/1/3/1/6/131636899/2dadb3aaab.pdf
    • http://mta53.somekindofsimple.com/uploads/1/3/0/5/130540214/5057938.pdf
    • http://christonlychrist.com/uploads/1/3/0/6/130621371/7986734.pdf
    • http://halicocalis.com/uploads/1/3/0/2/130273915/pamevirijo.pdf
    • http://reachsports.net/uploads/1/3/0/2/130272325/3248170.pdf
    • http://cubanostreetfood.com/uploads/1/3/0/6/130621404/vetuxum.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_off000076fb.bin
aaa961c2a79d6d8dd52950de81e5dba303e96c4ba47d734494c47594997ed7d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76FB 9176 bytes
font_01_sfnt_off00009996.bin
8eb53d4c2c68eef08123e942bb5078f724a4746dc51873c4aa64d865f2ab8fb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9996 10640 bytes

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