Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e7bcb138b10d7a2…

MALICIOUS

PDF

33.9 KB Created: 2021-06-23 02:33:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2867a15a52215846159a951b2261b060 SHA-1: a4c969b6ae240fd90fa00e600d24d75ae1d0506b SHA-256: 8e7bcb138b10d7a2f38f11dc2297909c60a3f4b581070b7ccf3ee8b987cb5600
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one identified as a malicious redirector. The document body and heuristics indicate a lure for game-related cheats, specifically targeting Roblox and Coin Master. The primary malicious URL, http://netcdn.co/app/431946152/how-to-get-free-admin-on-roblox-game-hack, is likely used to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-free-admin-on-roblox-game-hack In PDF document text
    • https://dr-willmer.de/images/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-hack-no-verification-on-ipad_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/roblox-studio-hack-message_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/best-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/coin-master-new-link-free-spin_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/pokemon-go-free-raid-passes-2021_GM1094591345.pdfIn PDF document text
    • https://dr-willmer.de/images/robux-hack-august-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-roblox-skin-generator_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://dr-willmer.de/images/774-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/hack-work-at-a-pizza-place-roblox_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://dr-willmer.de/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/como-hackear-dragon-ball-rage-roblox-2021_GM431946152.pdfIn PDF document text
    • https://dr-willmer.de/images/free-robux-codes-no-verification-2021_GM431946152.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_001_off000029e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x29E2 23668 bytes
SHA-256: 4a0dd11370b962110943948ad23ab146e8f88f15f69deacf41683c9d2b09247e
font_01_sfnt_off00005e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E80 19472 bytes
SHA-256: f07f8e93c1a65d84c8a5dd59880c7dd45f034047bac1adad0182241965212462

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