Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4cc3c42396c8b87…

MALICIOUS

PDF

46.1 KB Created: 2021-05-17 00:38:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98198413734326c31e905e4c66cfaeb6 SHA-1: e5a6a6e8b475ba52b7d20c6c03d88c720fb77063 SHA-256: b4cc3c42396c8b8792bcffa184771158385839db3ed1aa0a685b13aadb7605f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' or 'game hacks'. The primary malicious URL identified is https://netcdn.xyz/app/406889139/free-spin-coin-master-link-today-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure designed to redirect users to potentially harmful content, likely for further payload delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-spin-coin-master-link-today-game-hack In PDF document text
    • http://caraless.com/images/rbx-com_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://caraless.com/images/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://caraless.com/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://caraless.com/images/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://caraless.com/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://caraless.com/images/gamehunters-club-coin-master_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_off00004b5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5A 25268 bytes
SHA-256: 08875d53a3eae92fbabf206ea9c474b2326c382ff412a992b3f9b963fa75cf58
font_01_sfnt_off000084c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84C0 3560 bytes
SHA-256: c953d730e49f69c7d62e02a926729ae4a31de13d9a976dc4a95b39cf47066c93
font_02_sfnt_off00009146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9146 18412 bytes
SHA-256: b350531339c9517a18660b7b0575dfec4269b2a4083a2d9381830f178b2ed085

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