Malicious PDF — malware analysis report

Static analysis result for SHA-256 acf787f8ea632064…

MALICIOUS

PDF

38.5 KB Created: 2021-05-13 13:34:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c29fb2350708cecb0186485a524c0419 SHA-1: 834ebebd8c7df5e937c85ed044644cd6ae906c3c SHA-256: acf787f8ea63206420fb6c7d2534f023b04a7fe789c2d038b071950e223ee99f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically promoting a 'Coin Master Links Free Spins Game Hack'. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-links-free-spins-game-hack, is the primary indicator of this phishing lure. Although no scripts were extracted, the document's structure and heuristics strongly suggest a phishing attempt designed to redirect users to potentially harmful content.

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/coin-master-links-free-spins-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_off00003337.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3337 24532 bytes
SHA-256: bd7bedcfcb2fe98067d6d2112af4ad2eede6a4d790f55512f2d713d3c86cbf07
font_01_sfnt_off00006bef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BEF 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off0000758f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x758F 18056 bytes
SHA-256: 95118de0f1fa2d9d8d6d34d7ce9f6e9c56d43c25fce4d2a4bd556d275959b9e0

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