Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c82d39e5542b65b…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 17:11:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 425b2f7f58cab0d8e9e2793979b02810 SHA-1: 8db55353bcab2127e7961bfba40c282766a8b933 SHA-256: 7c82d39e5542b65b169f19926cea4b9a74062022fafdf2968b0d58ea0066d23d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically promoting 'Coin Master Hack' and 'Robux' generators. The document body, though heavily obfuscated, contains references to these lures and the primary malicious URL. The presence of these links and the ML classifier's high confidence score indicate a phishing or scam attempt designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-hack-2021-download-game-hack In PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/robux-generator_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/get-gold-coin-master-village-hack_GM406889139.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_003_off00004b4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4C 25752 bytes
SHA-256: 3949765800cc5cd26bbddba06b246fef90412b91eb48c43a18dfc99e184259ae
font_01_sfnt_off000084e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84E1 18696 bytes
SHA-256: 01e33fa384fcd9559826a4aa1de189e20085b3e2fa6b70097625b29721cffd1e

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