Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a25b0a583beba7b…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 07:26:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dbefc716ff38fc3c85841f399c8fe6c8 SHA-1: 88037eec944b8f8e3bdfcc54bc04ba6011835608 SHA-256: 8a25b0a583beba7bbf92b65923af24d7b7cf3c80e4de91f3f2b2a96902ba84fd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links, including one identified as a malicious redirector. The document body and heuristics suggest a lure for free game-related items, likely to trick users into downloading malware. No scripts were extracted from this sample, but the presence of malicious links and the lure indicate a high likelihood of a phishing or malware distribution attempt.

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.tw/app/431946152/free-robux-hack-no-verification-game-hack In PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hack-script-mad-city_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/cheat-granny-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/como-hackear-cualquier-cuento-en-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-hack-in-2021-in-all-games_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hack-roblox-origin_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/roblox-gang_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-rs999-999-999-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/retail-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/inspect-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/free-noclip-download-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/silent-assissin-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/crazy-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://pustaka.faterna.unand.ac.id/repository/qtx-roblox-hack_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_off00002d2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2A 22268 bytes
SHA-256: b5808fe137a871908b1ad219b557ff1a1bfba09cf61fc3d51193cd1100c94beb
font_01_sfnt_off00005eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDA 19244 bytes
SHA-256: 96540bd7c84d60e769713d590412c745bf113fce47b0f54684cca50d2dde6ca8

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