Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b33ba9c80082de…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 19:01:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 53863d7bb0672a8c440d0647090019d0 SHA-1: 344e1ab7a80f6d5a9640cfea45ec2568e1b3f409 SHA-256: c5b33ba9c80082de194f1153e0c96896f36fe806f0c3b405beb552c24505a151
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' or 'game hacks' for popular games. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs and the nature of the lures suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/can-you-give-me-robux-game-hack In PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-account-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/what-do-points-do-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/play-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/completed-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/minecraft-hacked-client-bedrock_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/how-to-get-free-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/100-robux_GM431946152.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id//repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://lib.stiesultanagung.ac.id/repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47E7 24928 bytes
SHA-256: bc7964843bafd3081b82d063bc4270c4f03e576dfcbde7a931a1bde0cd2bd40c
font_01_sfnt_off000081b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B1 18668 bytes
SHA-256: 3334d56de644c5130d7cfce4c730b38c4c16fd76a637e538689659e13837f7db

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