Malicious PDF — malware analysis report

Static analysis result for SHA-256 f90c711df41ff0dd…

MALICIOUS

PDF

36.2 KB Created: 2020-04-07 18:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a6e165cb89f7b0d4a235db5ec1258e8e SHA-1: 53265b2aae163397d838eb8fc252d62628f386b0 SHA-256: f90c711df41ff0dd4dd247d115c5136e9467ea3763b92f78f9a1569ba5126d33
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, many of which point to other PDF files on various domains. This behavior is indicative of a link farm or a phishing campaign designed to redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://edgelandscapeandmaintenance.com/uploads/1/3/0/8/130814293/130814293.html#ue4+homing+projectile
    • http://bakeman.org/uploads/1/3/1/4/131453215/pamojizenoxi.pdf
    • http://thereforemade.com/uploads/1/3/0/8/130814597/liluv-wipezoxa.pdf
    • http://happytailspetgear.com/uploads/1/3/0/2/130288462/sumokovodu.pdf
    • http://semenyih-landed.com/uploads/1/3/0/5/130588795/biwugenilenamufif.pdf
    • http://leahestes.com/uploads/1/3/0/6/130620579/c0936e.pdf
    • http://mishpuchacards.com/uploads/1/3/0/8/130874127/zufodotewo_tirupogevowes.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_off00005a80.bin
6f86ffd5d46f0a516cf094add32066c88fc358d7c3097c299fd72ab0ed51649d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A80 7932 bytes
font_01_sfnt_off0000795e.bin
bb66d78edca8aa75a8db461931e44ad6eab12e4cd439df836d92d13c6ef6c22d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x795E 2668 bytes

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