Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a04086229115c6…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 06:36:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29e7a1f21916f0fa13a0aca2a21e39fb SHA-1: 3120068e2c8844a0d5a2e8ee68a2438964e5c7b8 SHA-256: 33a04086229115c6273236f860ed0b898cb14607f3e9dfe5c737f24817af6e91
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'game hacks' and 'free spins' to lure users. The primary malicious link identified is https://netcdn.online/app/406889139/coin-master-free-spins-promo-code-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack, likely intended to lead to malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-free-spins-promo-code-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/banning-hacks-for-khols-admin-house-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/fake-robux-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robux-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://coinmasterspinandcoin.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000519a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519A 24832 bytes
SHA-256: 8f98c4bddd89085b7d27945a9fb4b884c7f7dc21fdb45b037c50e6167399afc0
font_01_sfnt_off000089c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C5 2868 bytes
SHA-256: d2d857e2ddc1082c7667b23f2135a5c0ba26a2ff8b42c86c89c8e0b09aece855
font_02_sfnt_off000093af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93AF 18476 bytes
SHA-256: dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a

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