Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf857b516847e18f…

MALICIOUS

PDF

37.0 KB Created: 2021-05-10 12:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cf261a552342a229d84098bc12b9ccba SHA-1: 857f4acab01757d456b9e60a441c0ce0dd4f34f1 SHA-256: bf857b516847e18f37e4bda7c01008bf4d93635e7b85600c10bc2bfd06a55682
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a lure for game hacks and generators, directing users to a known malicious redirector. The document body text reinforces this lure with phrases like 'Free Game Pack With Google Play Coin Master' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR'. The embedded URL is the primary indicator of malicious intent, likely leading to further malware or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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-game-pack-with-google-play-coin-master-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_off00003615.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3615 24952 bytes
SHA-256: 1f152259c335a09c5ba7b7297e510278bbf9223bce75e4a6ffed4729f1815f7c
font_01_sfnt_off00006ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CE4 19200 bytes
SHA-256: be98b09ab2c06fbf73b0f12808a7bd14d726d15742b97e619ffca2063d62e21c

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