Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde96e16bb115dcd…

MALICIOUS

PDF

43.1 KB Created: 2021-05-11 05:02:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c92e8617827e2368a34a8f873715651a SHA-1: a404e0fefeced517201169bcbd06066c3042b349 SHA-256: dde96e16bb115dcd2faee170f22d95a3e5c7d965bd5786d2f1812bec0d1e066a
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'Roblox Hack 2021' and leading to the URL https://netcdn.xyz/app/431946152/roblox-hack-2021-game-hack. The document body, though partially garbled, also contains references to game hacks and generators, reinforcing the lure. The presence of malformed streams and a high ML classifier score further indicate malicious intent, likely to redirect users to a site that could host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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 https://netcdn.xyz/app/431946152/roblox-hack-2021-game-hack In PDF document text
    • http://perpus.stihpada.ac.id/repository/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/robux-claimer_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/how-to-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-gold-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stihpada.ac.id/repository/game-hack-coin-master_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
stream_003_off0000480d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480D 27140 bytes
SHA-256: 91573457d01230586460c09b8250f2f34c07322f3758c5ed5da3f757e7c6d411
font_01_sfnt_off0000852a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 18584 bytes
SHA-256: 2941163c9806e22b58ea5552aa71059231a9f2c3bbffbca0ecd460ca17501cff

Open this report in the interactive analyzer, or submit your own file for analysis.