Malicious PDF — malware analysis report

Static analysis result for SHA-256 311a2a7672a3fd0b…

MALICIOUS

PDF

33.1 KB Created: 2020-04-09 01:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 994bee9ac43a77f888969279ac2861c5 SHA-1: c44dad43c07acbf6c750c3d2a8b9cda96c6e7a2d SHA-256: 311a2a7672a3fd0b8034142f89dcbc6ddb19d52a0f28dc20ff45030ed18b3681
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains a large number of external links, many of which are numerically or generically named, suggesting a link farm or SEO spam tactic. The document body, though heavily obfuscated, contains references to 'Uganda national anthem lyrics pdf' and the authoring application 'wkhtmltopdf', indicating a lure to a network of websites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://overdriveglobal.net/uploads/1/3/0/5/130588484/130588484.html#uganda+national+anthem+lyrics+pdf
    • http://nzingakadalie.com/uploads/1/3/0/8/130814285/8b8cbb57ac.pdf
    • http://theabundantchurch.org/uploads/1/3/0/4/130483973/1500690.pdf
    • http://lovelaughpaint.com/uploads/1/3/0/6/130604258/2471674.pdf
    • http://metricaone.com/uploads/1/3/0/8/130813956/wukuxen.pdf
    • http://printlime.com/uploads/1/3/1/1/131164198/pozemewekobava.pdf
    • http://athleticoptimization.org/uploads/1/3/0/5/130590338/fozepetoxu-savone-jibusigimuga-vasixiri.pdf
    • http://stjsewardyouth.org/uploads/1/3/1/3/131383790/17c5972eab.pdf
    • http://865anglercustomtackle.com/uploads/1/3/0/7/130739126/zamisubaf.pdf
    • http://vr-authority.com/uploads/1/3/0/2/130287813/2149149.pdf
    • http://sow-it-grows.com/uploads/1/3/0/5/130540083/5124525.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b4.bin
5001f6bcec67c221cf7a18ba6ae370476c15c321c03d04c94bb6ef9dda26461b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59B4 7640 bytes

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