Malicious PDF — malware analysis report

Static analysis result for SHA-256 6142e8559e3cbc33…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 14:40:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b2623bd071d77eda99acbc924da79be1 SHA-1: e7cb8002ab1d952ff83dadf4024e119621624c5b SHA-256: 6142e8559e3cbc33786e4d1b9941979321b348ff9bccc37f45de26d3473aa395
160 Risk Score

Malware Insights

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

The PDF document contains a lure for free game currency, specifically 'Roblox Hack Unlimited Robux', and includes a link to a known malicious redirector. This redirector likely serves as a gateway to further malicious content or downloads, aiming to exploit the user's interest in game cheats. The ML classifier also strongly indicated maliciousness.

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.tw/app/431946152/roblox-hack-unlimited-robux-game-hack In PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/hacks-para-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-mining-sim-hack-pastebni-december-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-hack-reviews_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/roblox-red-boy-hack-download_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/games-that-get-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/how-to-do-a-dick-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/free-coins-coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/programas-para-hackear-roblox_GM431946152.pdfIn PDF document text
    • https://www.thekukkad.com/uploaded_files/userfiles/files/robuxy-com-free-robux_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
font_00_sfnt_off0000309f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309F 22244 bytes
SHA-256: 123b75dfc625856569f8067fc71b14da4993a9910ba9ea45588c99a7df21b500
font_01_sfnt_off000061b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B5 19452 bytes
SHA-256: c21e99ebfc9f7e5f39e71a68abf279300e15561c35a4934f0c8f70bb34e99d3b

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