Malicious PDF — malware analysis report

Static analysis result for SHA-256 72c042d152f6b0c0…

MALICIOUS

PDF

52.1 KB Created: 2021-05-13 15:06:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8cbd87d04703068b14f7d021fe9db673 SHA-1: 696d9b91ed6f8d28c4045e64fac796be1ebedc20 SHA-256: 72c042d152f6b0c04ef34aeb10174c0e4db99544d77c36efc36537155655ae01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generator / game hack' lures. The document body and embedded URLs suggest a social engineering attempt to trick users into visiting these sites, which are likely used to distribute malware or conduct phishing. No scripts were extracted, but the presence of malicious links and the ML classifier output strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9300

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/431946152/free-roblox-passwords-game-hack In PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-real_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-attack-madness-hack_GM406889139.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_off00004c66.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C66 28276 bytes
SHA-256: 6f0180640320f09b613f56fbf3b271c1502dc26913787f7710c71ad6dc362ddf
font_01_sfnt_off00008d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D94 8420 bytes
SHA-256: 283666c03114f88156d03652ca4f115724fa2bff42c52f8995f81b4ff59cb027
font_02_sfnt_off0000a887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA887 18668 bytes
SHA-256: 2fa2c5403ec1c86ab3807ffc76d8ff15a2d608ae4c9a7b06441cca7eaabeec69

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