Malicious PDF — malware analysis report

Static analysis result for SHA-256 c331cc80b5b36385…

MALICIOUS

PDF

39.6 KB Created: 2021-05-13 21:14:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9609b0a1d259e4daa5daccf7b91353ac SHA-1: d6976ab957d99f405fce8e365d6116b7062943df SHA-256: c331cc80b5b3638568e9658a05f5c4185d8197fc23042cb43c6888a504dd65fe
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors, specifically advertising a 'Coin Master Free Codes Game Hack'. The document body also contains a call-to-action phrase 'CLICK HERE TO ACCESS COIN MASTER GENERATOR'. These elements strongly suggest a phishing or scam lure designed to redirect users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8625

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-codes-game-hack In PDF document text
    • http://kaleasm.org/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://kaleasm.org/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://kaleasm.org/images/minecraft-hacks-18-9_GM479516143.pdfIn 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_off000036f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36F0 25392 bytes
SHA-256: 516f900bb936b98332911a03051df9cb072e77bc57334d1d28bb715d57753451
font_01_sfnt_off0000705b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x705B 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 17884 bytes
SHA-256: dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b

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