Malicious PDF — malware analysis report

Static analysis result for SHA-256 098ab8582f704432…

MALICIOUS

PDF

36.8 KB Created: 2021-05-17 03:36:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ba8cd81dca354a6fb7a14863d669c895 SHA-1: 0ec97797b7202e0d2a28283e142ce9aa983dbbcd SHA-256: 098ab8582f704432d3a47428fe3b6b87f690195388294358a6550a3874efeb48
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to a malicious redirector disguised as a game hack generator. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-2021-spin-link-today-game-hack, is confirmed to be part of a malicious redirection chain. The document body also contains this URL and a call-to-action phrase, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://netcdn.xyz/app/406889139/coin-master-free-2021-spin-link-today-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003642.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3642 23996 bytes
SHA-256: c191217e3830b63947aa8c4b38033a6e2c30652f1ca33a343882d622a0f4b539
font_01_sfnt_off00006cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB5 18812 bytes
SHA-256: 7f624a4da072bd42e21ae13ab081f80009d2c012a41e181bc6a40f65c236f9bb