Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8c44a875aa0f49…

MALICIOUS

PDF

35.8 KB Created: 2021-06-18 23:18:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 34da34c6f82ff8a30515a4e269aa0cd1 SHA-1: 78c78ffb137579b9b59b2649ff3560b8a307f1f3 SHA-256: af8c44a875aa0f492936d27a9dcfb588edf9bfb247ce3af8f00764f404dbfe37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in free game currency like Robux. The embedded URL points to known malicious infrastructure designed to redirect users to potentially harmful sites. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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-how-to-get-free-robux-without-hacking-game-hack In PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-robux-group_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/install-coin-master_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/roblox-jailbrike-hack-slurp_GM431946152.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://rsudmangusada.badungkab.go.id/new/public/ckfinder/userfiles/files/coin-master-email-rewards_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_off00003323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3323 22412 bytes
SHA-256: 855fabfe95899cf5e10f690cb8c234443e9856b4da80036459297b75d6d63f6a
font_01_sfnt_off00006521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6521 19712 bytes
SHA-256: 2f1343f5d3ae23d6d80008aa75e3776285b09424329d89aa0c26cd7f431862bd

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