Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b3dca9d877a3692…

MALICIOUS

PDF

33.7 KB Created: 2021-06-22 03:51:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e7a02679b62ef77d7370377f86209de5 SHA-1: 740dcc5feccb539e738b224e8a5b43fd9d791cb8 SHA-256: 8b3dca9d877a3692a816273a87d44ec189b3c1a7005bc495d0c7e43baf2b6a4c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to a known malicious redirector, disguised as a 'free generator / game hack' lure. The primary URL, http://netcdn.co/app/431946152/free-rich-roblox-passwords-game-hack, is likely used to funnel victims to malicious sites or phishing pages. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game cheats to facilitate further malicious activity, potentially leading to client-side exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-rich-roblox-passwords-game-hack In PDF document text
    • https://dr-willmer.de/images/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/774-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/wurst-mc_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/get-robux-no-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/infinitejump-hack-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-hack-assasssain-in-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-my-girlfriend-cheated-on-me-meme_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • https://dr-willmer.de/images/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-free-spins-link-quora_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/hacks-for-boulevard-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/best-free-minecraft-servers_GM479516143.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
font_00_sfnt_off00002c4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4B 22124 bytes
SHA-256: d0bbd11baa51720757e07ab8a56aec400ddf21ecbb59b28eb698c7db90e62e92
font_01_sfnt_off00005d76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D76 19428 bytes
SHA-256: 8b9a28181826c73929000fd190df49b8475948e2abaa3ed77a863405fbb69067

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