Malicious PDF — malware analysis report

Static analysis result for SHA-256 883c044e234d7170…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 09:01:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8e367e48a5c601cc7e6eabed962cd199 SHA-1: b8806875bee30ce74bbc628650e6512c2eecb8aa SHA-256: 883c044e234d7170bda2cc6bbfaacb556a6d710febbe2e24f1789f7738f80046
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising free items and hacks for popular games like Roblox and Minecraft. The document body and embedded URLs strongly suggest a lure to trick users into visiting these malicious sites, likely for further exploitation or malware delivery. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/free-item-november-2021-roblox-game-hack In PDF document text
    • http://perpus.masda.ac.id//repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-10m-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-do-get-free-rocket-fuel-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-link-may-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-apk-ios_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/games-like-roblox-but-better-and-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-use-redstone_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/digimon-masters-roblox-cheats_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_off000030fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FA 21912 bytes
SHA-256: 8a0de56d9faafe1d0b110fa491d75e13b529abb8120d885a96f3ec98f0be9e9d
font_01_sfnt_off0000611d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611D 19532 bytes
SHA-256: e1bb4a9481859c636459b2651904ab58c6f1f037ff2d0b230561bc0cec381646

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