Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6440eddae51e115…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 06:44:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 86328aa3ad42371fda506e7f9ccb8e3e SHA-1: cadf4c1a9d18cb6b6810afa422c367a36fbedff0 SHA-256: d6440eddae51e115b069670ee42b9fb423d92efe72ce4c0ed437e9d2f5de488c
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded links, with a primary lure pointing to 'roblox-gift-card-online-free-game-hack'. This heuristic firing, combined with the ML classifier, strongly suggests a malicious intent to redirect users to potentially harmful websites. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a social engineering tactic to trick users into downloading or visiting malicious content.

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-gift-card-online-free-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/how-to-join-free-buldiers-club-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-level-7_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-theme-park-tycoon-2-cheat-engine_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-cheats-for-mac_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-pc-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-scp-foundation-model-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/von-roblox-facebook-hacken_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-for-roblox-jailbreak-downloads_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/www-roblox-com-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/https-webrobloxcom-games-2021202177-creeperawwman14-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-minecraft-mods_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_off00002ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF5 22216 bytes
SHA-256: 27afcb43bb8d977165b3abeae8a25dfb44103a43207ec16a0abc212bc83b9a89
font_01_sfnt_off00006170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 19048 bytes
SHA-256: 55b46331afb2a8069782d8597c001b3c0c12b84d77f3d9baa1c75e4cada97544

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