Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa0311bec3b43d7…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 16:19:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2a17d3afe34dbc47503007262d97bed8 SHA-1: e6065b2e70700771606c6e9715f1a6b5f39157ca SHA-256: 3fa0311bec3b43d7141351bdd6be2b6b94f3947c3b5bf3324e44c856e748d885
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that lead to known malicious redirectors, disguised as game hacks and generators. The primary lure appears to be related to Roblox and other popular games, aiming to trick users into visiting potentially harmful sites. The presence of numerous redirector links and the ML classifier's high confidence score indicate a malicious intent to lead users to malicious content or further compromise.

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/roblox-hack-how-to-load-gui-game-hack In PDF document text
    • http://tah-li.com/images/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/robux-cheaten_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/roblox-how-to-cheat-on-fantom-forces_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • http://tah-li.com/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/roblox-free-10-robux_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/noob-vs-pro-vs-hacker-vs-god-w-roblox-waiting_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-get-the-headless-head-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/roblox-hack-club_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/how-to-create-your-own-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://tah-li.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://tah-li.com/images/roblox-bubble-gum-simulator-pet-hack_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://tah-li.com/images/does-getting-1-million-robux-for-free-work_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_off00003059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3059 22468 bytes
SHA-256: 35eecf5f1bcc5555232ac7d36481688811a3790fd0ec6963e4804b6aad6f1840
font_01_sfnt_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 19256 bytes
SHA-256: 923cba10406c14d4882fdb54bd62f6700adf852e3b4408b6234d36feb3352df3

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