Malicious PDF — malware analysis report

Static analysis result for SHA-256 83de0c4cf2a3ba54…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 21:46:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: deb26d8081b0462c4d7dac42da0fec63 SHA-1: 6b93caddadb33dc9c415cf1a6feec847c6ff8a4f SHA-256: 83de0c4cf2a3ba549aaff00a6326b377788fd67688d4b13f366f7936de8c3aef
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free in-game currency or hacks for games like Roblox. The primary lure is "where-to-get-free-robux-on-roblox-game-hack", which redirects to malicious infrastructure. This suggests the document is designed to trick users into visiting potentially harmful websites, likely for credential harvesting or further malware delivery.

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/where-to-get-free-robux-on-roblox-game-hack In PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/fly-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-50-robux-free_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-teleport-using-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-get-free-robux-hacks-online_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/somebody-hacked-my-roblox-account-prestonplayz_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-destroy-roblox-place-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://perpusfkip.upstegal.ac.id/repository/how-to-cheat-on-roblox-with-mhs_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_off00003171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3171 22276 bytes
SHA-256: 728100a61f20aed152e6c651d14279ea687aefdfb4aa33f7663e99c07b343d22
font_01_sfnt_off000062e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E0 19260 bytes
SHA-256: a20b089d897f14c57019cdcfaf5c92b4f68c8ec195794af8c37855149968a294

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