Malicious PDF — malware analysis report

Static analysis result for SHA-256 a82df7fb8c72e3ad…

MALICIOUS

PDF

35.3 KB Created: 2021-07-02 03:39:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9efc98f0b0fb2d618cf287f2abb71871 SHA-1: 16f7b16f2cdbf5faf23ab857c64c818c81ad5d61 SHA-256: a82df7fb8c72e3addceb90734082dc89cf87d701a546495021f567e1de8dfb6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier strongly indicates maliciousness, and the document body contains multiple URLs promoting game hacks and free in-game currency. The presence of external URIs and the overall theme suggest a phishing or malware distribution lure, likely intended 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/how-to-make-everything-free-on-roblox-game-hack In PDF document text
    • https://lib.unitri.ac.id/repository/roblox-noclip-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-every-game-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-gift-card-codes-2021-may_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-bubble-gum-simulator-script-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-apocalypse-rising-hack-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-password-with-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-hack-retail-tycoon-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-account-hack-download-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/volar-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/autoboss-roblox-free-robux-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-boxing-simulator-2-cheat_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-coin-master-link-2021_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
font_00_sfnt_off00002f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9F 22764 bytes
SHA-256: bae7161af0cf099b76e69e1e9ecfe72fb8af7850991dcbf88f3ab864ce7ce2f4
font_01_sfnt_off000062aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 19864 bytes
SHA-256: e4df3515d55d5a1c85ad32342ecab142dd89f56a7b316eb4c58709bf6ee4a684

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