Malicious PDF — malware analysis report

Static analysis result for SHA-256 6148e81d7a1631d7…

MALICIOUS

PDF

45.6 KB Created: 2021-06-10 12:56:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0890a9d459632aa91eb1bda8ab171dd0 SHA-1: d1fe7b90f9e81d7cd8c3a9176eb9307e56820eda SHA-256: 6148e81d7a1631d7a0240bc4b41a1e81273e42dd97a7d9f24f2c3c5a6488029e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains and lures related to game hacks and free currency, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The embedded URL 'https://netcdn.tw/app/431946152/unlimited-robux-hack-2021-game-hack' is a primary indicator of the malicious redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/unlimited-robux-hack-2021-game-hack In PDF document text
    • https://bullyinformate.org/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://bullyinformate.org/images/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • http://bullyinformate.org/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • https://bullyinformate.org/images/roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/daniel-newhard-roblox-hack_GM431946152.pdfIn PDF document text
    • http://bullyinformate.org/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://bullyinformate.org/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://bullyinformate.org/images/how-to-install-cheat-engine-for-roblox-no-winrar-required_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/knife-hack-roblox_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/cheat-codes-for-roblox-skywar_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/robux-hack-million_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/roblox-free-product-script_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/robux-hack-image_GM431946152.pdfIn PDF document text
    • http://bullyinformate.org/images/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://bullyinformate.org/images/free-drawing-roblox_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/free-afro-roblox_GM431946152.pdfIn PDF document text
    • http://bullyinformate.org/images/download-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://bullyinformate.org/images/roblox-how-to-get-any-face-for-free_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/free-roblox-mad-city-hack_GM431946152.pdfIn PDF document text
    • https://bullyinformate.org/images/roblox-build-tools-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B4 25468 bytes
SHA-256: 45d86576af81c320fa5272a8c525862d16125b34e1b609e9d4262845b123b600
font_01_sfnt_off00008bad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAD 19568 bytes
SHA-256: e01aaafeaeecb8749aeb80b7b0b248ac98b3d5b7fa1d6af2324588e2dc2f691d

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