Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43cb7f99b59c765…

MALICIOUS

PDF

35.3 KB Created: 2021-07-02 02:07:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9266ab21ceb688aef7a577e54f92cb9f SHA-1: 11336ebce9ea15b8c12f44ca79e8085e43e0bd08 SHA-256: b43cb7f99b59c765ad30d15081e01f0eed872756c4d67d65b7bbed05369c8993
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains an embedded URI and multiple other URLs, many of which are related to game cheats and hacks, suggesting a lure for users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a visual download button further supports a deceptive workflow. The document's content and embedded links indicate an attempt to trick users into downloading a second-stage payload.

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/does-cheat-engine-wk-on-roblox-any-more-game-hack In PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-restraunt-tycoon-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-scibt-pack-exploit-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/promo-codes-for-free-stuff-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-jailbreak-cheat-codes-and-hacks-for-samsung_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-codes-for-items_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-hack-2021-pc-only_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-tiktok-likes-and-followers_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-bubble-gum-simulator-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/unlimited-robux-hack-no-download_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-unlimited-money-hack-jailbreak_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_off0000305f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x305F 22976 bytes
SHA-256: 3c8039249455552dd5b6f0b8ceee5db9cc85892dcb3b4b6f671e682cd9528985
font_01_sfnt_off000062f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F9 19788 bytes
SHA-256: c521722eb2d3694486796528e735eddb87ca4fa4ef649e88f2bb1df1a2869123

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