Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea57e0abb1ad365…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 22:05:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0b499c12fa5255727a296c5e9d6e3f3c SHA-1: d75cc337b9b19f2d72229026475c36cd8ddcfe1f SHA-256: 4ea57e0abb1ad36578da0a7cf405a01da532f280e1ddd740eb7537b29594e26d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically targeting users interested in game hacks. The embedded URL 'http://netcdn.co/app/431946152/script-hack-bloxburg-roblox-game-hack' is identified as malicious infrastructure. The document body, though partially garbled, also contains this URL and references to game hacks, reinforcing the lure. The ML classifier also flagged this PDF with high confidence.

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/script-hack-bloxburg-roblox-game-hack In PDF document text
    • https://library.fdk.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-promo-codes-robux-free-202100_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-glitch-no-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-hats-and-gear-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-giver-no-download_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-c4d-roblox-rig_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-how-to-use-nebula-exploit-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/project-alpha-200-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-roblox-in-3-steps_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-roblox-cheat-injectors_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-hack-fly-download_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-into-someones-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-tycoon-simulator-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/download-free-robux-app_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-hacks-for-mac_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_off000032c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C5 22512 bytes
SHA-256: 04af646052dec2eea7b94d8381085ab620a85b3f521615908b90005129067f14
font_01_sfnt_off00006522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6522 19196 bytes
SHA-256: b0f3a2851cc4afe63e6e357734a491fa27a57a42eaa2dc29b950c4680b23be58

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