Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ec948ed9deacdd…

MALICIOUS

PDF

38.2 KB Created: 2020-06-08 07:42:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11009b08b5f27b19c4f58c55ed566cd0 SHA-1: 2bf4d86aa3d847e56896461cd03c96390874b173 SHA-256: c5ec948ed9deacdd52a1450a80d24329222b9c59833cbacc841085ec5a3d566f
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on unrelated domains, indicating a link farm for SEO manipulation or malware distribution. The document body itself contains a lure related to 'Game of Thrones' and embedded URLs, suggesting a phishing or content-luring attack. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://desandchriswedding.com/uploads/1/3/1/3/131380383/131380383.html#game+of+thrones+4.+sezon+8.+b%25C3%25B6l%25C3%25BCm+t%25C3%25BCrk%25C3%25A7e+dublaj
    • http://tourdelaw.com/uploads/1/3/1/6/131607703/5718508.pdf
    • http://hostmaster.cornerstonecounsellingservice.co.uk/uploads/1/3/0/6/130604838/9905448.pdf
    • http://townesquaresalons.com/uploads/1/3/0/2/130288510/riwivefovale.pdf
    • http://the209agentkiosk.com/uploads/1/3/0/8/130813030/tutedajoxi.pdf
    • http://secondnatureleadership.com/uploads/1/3/1/8/131856771/wedoz.pdf
    • http://mariandclairegetmarried.com/uploads/1/3/0/8/130814250/896399.pdf
    • http://endenlabs.com/uploads/1/3/1/3/131379914/e6c5c94.pdf
    • https://gozikes.files.wordpress.com/2020/06/kimixewabugiru.pdf
    • https://tekudiraxopi.files.wordpress.com/2020/06/fedamiredejodozeninan.pdf
    • https://toxagam.files.wordpress.com/2020/06/78323333287.pdf
    • https://nakoxamidi.files.wordpress.com/2020/06/zevujavubobugibimat.pdf
    • https://lejobadoni.files.wordpress.com/2020/06/viwazo.pdf
    • https://tigizixer.files.wordpress.com/2020/06/xilubavelubixudojivad.pdf
    • https://pomosoku.files.wordpress.com/2020/06/katepitebitaginugolidum.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_off00006581.bin
bc4d988652ebc3bdb8da842668df978a82deb56faec4f158dbe1f1984e307bd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 11808 bytes

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