Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa690baca4c99e57…

MALICIOUS

PDF

34.1 KB Created: 2021-07-09 17:13:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d5ad8a695b902edfbf570e8e0904b047 SHA-1: b56019eb98109781388f209f64367494c9d50350 SHA-256: aa690baca4c99e574dff69af5451992f2a1ed2541d0c2422596a3c89cc3cd18f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, attempting to lure users into clicking on a URL that promises game hacks. The primary malicious URL identified is http://netcdn.tw/app/431946152/roblox-arsenal-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-arsenal-hack-game-hack PDF link annotation
    • http://www.msts.ac.th/UserFiles/File/free-robux-fast-pastebin_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/comment-avoir-des-robux-gratuit-hack_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/how-to-hack-roblox-jailbreak-keycard_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/roblox-cheat-engine-tablre-and-bypass_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-advertising-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/robloxjailbreakfreehacks_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-download_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/roblox-project-pokemon-hack-script_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/free-robux-scam-messages_GM431946152.pdfIn PDF document text
    • http://www.msts.ac.th/UserFiles/File/coin-master-free-spins-and-coins-daily_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_off00002f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4A 22372 bytes
SHA-256: c546ed34b77747f2c4db98598210809d619d7dc193dddebfb77a115acb894e71
font_01_sfnt_off00006121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6121 18656 bytes
SHA-256: 2a9da7e207da7f151e9dc698eb3be8a302bb8ec18d8a029c2d8305e65e62f0f4

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