Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb3d2dec3ace3674…

MALICIOUS

PDF

52.9 KB Created: 2021-06-09 14:12:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f46e7690244de249e378cf30d34bd0f5 SHA-1: 69cbb6d33c91f254cf7b716de3ff5dd5748be09e SHA-256: eb3d2dec3ace3674d042e05c16c97dcd6b5270e56f66d365bb3b15dbfe1cb733
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL, which is flagged as malicious. The document body and heuristics indicate a lure for free Robux or game hacks, designed to trick users into clicking the malicious link. The embedded links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9614

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.tw/app/431946152/complete-an-action-for-free-robux-game-hack In PDF document text
    • http://www.sbairs.com/datas/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robloxfun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/follower-bot-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/beasiest-robux-hack-in-the-world-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/minecraft-book-collection_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-use-cheat-engine-to-level-up-faster-roblox_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53CC 26640 bytes
SHA-256: d3c831f164d99123b28b912e60192500ec845c34ed11c136a9cf3cb2c92b160f
font_01_sfnt_off00009285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9285 7524 bytes
SHA-256: cfaac07b7c41eab6dd4978e4c75bda7634a98ba6d8ae194c94a3a01b0cc58ce1
font_02_sfnt_off0000ab4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB4E 18748 bytes
SHA-256: d0b63e3f6b9ce80633c03c3183848d3e652556fed7c207b8a0570b4e907ea756

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