Malicious PDF — malware analysis report

Static analysis result for SHA-256 252e413762bf023b…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 20:32:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 75369acec1ad910e939f0d9e5a61f8a3 SHA-1: ac23bc66bb79e07fbafe6f64bf21e6ec4f6ed843 SHA-256: 252e413762bf023bd9bfdbd7f4b37e0e04411706f416a4df19ee478fae2dd37b
160 Risk Score

Malware Insights

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

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, disguised as 'free generators' or 'game hacks'. The document body and heuristics confirm the intent is to trick users into visiting these malicious URLs, likely leading to further malware downloads or exploitation. The ML classifier strongly indicates maliciousness.

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/robux-hack-on-android-game-hack In PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-really-works-not-youtube_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/www-roblox-com-catalog-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/moon-active-games_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pubg-90-uc_GM1330123889.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-level-7-free_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-hack-prision-life-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-epic-minigames-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-ash-greninja-shirt-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/synapse-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-add-mods-to-minecraft-pe_GM479516143.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_off00002f4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4F 22444 bytes
SHA-256: d149d3f61c538e47dba928da855a944d8bbd889a4d90cca757e920448c1f3a3c
font_01_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 19016 bytes
SHA-256: 42820b2e74f27f4636fdcdba226acf6e2c994319aeedb6b52ec619ae988d59c8

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