Malicious PDF — malware analysis report

Static analysis result for SHA-256 73b400fe9e1c87f3…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 14:00:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 519ec463280c97f74f60df1ab07ff7e9 SHA-1: 6c033f14ac59b0a8dd35c128ba4bf59ec4a0d4b1 SHA-256: 73b400fe9e1c87f365a62974a8a4a8e37a828376acfe34758fa437b0dae93326
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to known malicious infrastructure, specifically advertising a 'game hack' for Roblox. This lure is designed to trick users into visiting a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/como-se-hacker-en-roblox-2021-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/obby-gives-you-10k-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-speed-race-hacks-download_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-skywars-coins-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-prison-life-how-to-hacks-jjsploi_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-video-games-with-a-egg-hunt-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-cheat-dll-phantom-forces_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-items-for-google-play-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-game-what-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/cheating-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-vip-server-roblox-saber-simulator_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-cheats-jailbreak_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-reedem-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-com-hack_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_off00002e0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0C 22324 bytes
SHA-256: f3430e2a9f6e4a23c7c7b0816caa122a07ee5ba586532fb7fc79d1131498de29
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 19320 bytes
SHA-256: 2f5e86d9b30e070c8a6f5239129f5fb387acf6f23c51d8ef5959c42dd83f1489

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