Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4c2e000542453f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 21:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b44d59ab345c6d4cdc8d6cb127171407 SHA-1: 72c7c93f522ff2e330429da91cb01c08df150f1d SHA-256: 0a4c2e000542453fd64e99f276ec86b0f5fe4c2487fe952456cfbbbe5d731545
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that lead to a known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks'. The document body and heuristics confirm the lure is related to obtaining free Robux or game cheats, a common social engineering tactic. The ML classifier also strongly indicated maliciousness.

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/can-you-give-me-robux-for-free-game-hack In PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-2021-robux-free_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-case-clicker-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-hack-2021-november_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/secret-forums-released-free-robux-duplicator-100-working_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/how-to-get-robux-for-free-legal-website_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-fashion-frenzy-games-free-online_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/redline-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/redline-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/hacks-for-counter-blox-roblox-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-change-your-roblox-name-for-free-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/fidget-knot-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/roblox-risky-strats-hack_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/roblox-delete-tool-hack_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/google-only-roblox-items-free-2021_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/setiadi/repository/how-to-get-unlimited-money-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpus.poltekkesjkt2.ac.id/respoy/repository/free-roblox-card-codes-june-2021_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_off00002ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC6 22704 bytes
SHA-256: 88fc941ea97efdbf0f7e37db4ab049f47a31bb6c6805975a2ac41385f6fbc21a
font_01_sfnt_off000061a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A0 19308 bytes
SHA-256: 78ee8c6d91a0d310961628d2a64cad3b2af12829c2e3f7cc04dd216edc038c36

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