Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bfad639a2f0cba2…

MALICIOUS

PDF

36.5 KB Created: 2021-05-21 21:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6ded9b0bd0b3691fb474bf5f38db3a63 SHA-1: a9df6f1dc74a62781e6cf1c912d79ae9b6ebe842 SHA-256: 2bfad639a2f0cba29f04dadb60873a3ed2bc6d0c73a4f8d136feea4b24c18667
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free spins. The document body explicitly mentions 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' and includes a primary URL that is a known malicious redirector. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/legit-free-spins-coin-master-game-hack In PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn 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_002_off000030ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30FF 25884 bytes
SHA-256: a5007316b5280ddc6e2cd27ea59da13a83dc5d2cb8c4304b6b11f05bb2255775
font_01_sfnt_off00006d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D79 18176 bytes
SHA-256: 0e4f5fc6ff2fec7c34f7a60300b1fa14fa22cd043badad59a9fad54dc28be7cf

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