Malicious PDF — malware analysis report

Static analysis result for SHA-256 90ceb6a97d8c085b…

MALICIOUS

PDF

37.2 KB Created: 2021-05-12 15:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 3490bc292edb8bf7d671b4693d484414 SHA-1: ad14bcbdd9e734beef854bacb930fa4ed01811bb SHA-256: 90ceb6a97d8c085b4fe5ad47185b8db2a22f586a99e4f5cee14f01d5bab829cf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users interested in 'game hacks' and 'Roblox generators'. The embedded URL 'https://netcdn.xyz/app/431946152/girl-roblox-avatar-game-hack' is identified as a malicious redirector. The document body also contains a clear call-to-action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/431946152/girl-roblox-avatar-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
font_00_sfnt_off000032c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C1 27428 bytes
SHA-256: 2694c7815a3b16596dd337117af5d64f994b21fb5e30acb5d0717d1e70d3132a
font_01_sfnt_off00006f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 18352 bytes
SHA-256: 40a6e93de1ad20fd8dc51d83f0b41a224bcf2e60033ebf60b5fe8b6dd784a017

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