Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f7b661db97b1a5…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 00:28:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b636705c1668860704dc541fcaa79617 SHA-1: aeba168dfa920f9223333cb187ef6600be325310 SHA-256: d3f7b661db97b1a5e6b9960dc2f4e95c524abf0d0f448dd061974ff697fd93f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that point to a known malicious redirector infrastructure. The document body and embedded URLs suggest a lure for game-related hacks or currency, a common social engineering tactic. The primary malicious URL identified is http://netcdn.co/app/431946152/pastebin-roblox-free-robux-2021-game-hack.

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/pastebin-roblox-free-robux-2021-game-hack In PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/creator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/near-tiktok-free-account_GM835599320.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-imperial-base-free-model_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pubg-mobile-uc-2021_GM1330123889.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/kazok-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-uc-on-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/withdraw-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/code-hacks-for-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/whatever-floats-your-boat-roblox-hack_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-login-to-cerberus-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-links-free-spins_GM406889139.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_off0000307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307F 22552 bytes
SHA-256: 887fa9b8ce261124df73668ccdb1616377dce758bed9279391cd433a0855cddc
font_01_sfnt_off000062c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C5 19568 bytes
SHA-256: 896cbd14af386eaed481ac85692ce887c36f6e2bd31ede0afbdb8aeb9e797fe7

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