Malicious PDF — malware analysis report

Static analysis result for SHA-256 4451b84c38c3d2c4…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 06:01:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: cb579dda55c6bcfd3edc97236ab1bc54 SHA-1: c9d9e0dcb48be0ff8b2108c2513f814cf5017579 SHA-256: 4451b84c38c3d2c438fec41e1d481c10233b4a783be4b5d3b7e2ca95bb7358a2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising game hacks and generators. The presence of a download button lure and ML classification further supports its malicious nature. The primary attack vector appears to be social engineering via a fake generator lure, leading users to potentially malicious sites.

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-attrition-hack-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-pc-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-demon_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/the-northern-frontier-roblox-cheater_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-vehicle-simulator-free-gamepass-script_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/halloween-free-skins-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hacking-poeple-in-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/cheat-engine-roblox-bypass-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-how-to-get-the-old-events-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-hack-inspect-element_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-rust-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-generator-2021-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-daily-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_off00003204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3204 22048 bytes
SHA-256: 34b3ddd499597c7a1d56b6b1fee64528ec3287eb23f0d2145ddb858020840174
font_01_sfnt_off000062cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 18880 bytes
SHA-256: 10ad3cfc03553679dad74d6372d0d4fa5abb7ee69d0be5430d7ba6ff4ec6e9d9

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