Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff0c6b41c92cbb1…

MALICIOUS

PDF

38.8 KB Created: 2021-05-12 06:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: ca7485ecacb815775800bed845180af1 SHA-1: a52415e8204d7effb9d5c19c560dc9c504430c53 SHA-256: 2ff0c6b41c92cbb133cba9809676aaea35d4370c95aad9e034c2273280c7842c
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for "Free Coins And Spins Coin Master 2021" and a "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call to action. This lure is associated with a critical heuristic firing for a malicious redirector link pointing to `https://netcdn.xyz/app/406889139/free-coins-and-spins-coin-master-2021-game-hack`. This suggests the document is designed to lead users to potentially malicious websites, likely for scams or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/free-coins-and-spins-coin-master-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A0 24612 bytes
SHA-256: e8c5c43fbae6151c3ee1bf000b31e32225621f89798d0665b0256e5d73ae3463
font_01_sfnt_off00006b97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B97 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007548.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7548 18460 bytes
SHA-256: 871f0cb0a27f8e5dd89901f10b004c29658dd5d4ba968b8e0fec3a5b4bbe6c5a

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