Malicious PDF — malware analysis report

Static analysis result for SHA-256 2782a716843c9dcc…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 13:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fbc14fac75f6c6859416fe76f4448c95 SHA-1: 124b0dabb73b8a1b86db16f166bd8fc4eaa06d72 SHA-256: 2782a716843c9dcceb4c7351c28e77a5fa58ca3130753bb48c580c1a345a4df3
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/479516143/wurst-hacked-client-112-2-game-hack PDF link annotation
    • http://www.travelone.ae/userfiles/files/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/www-free-robux-me_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-free-robux-pastepin_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-mega-fun-obby-cheats_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-free-robux-password-required_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/cool-exploits-for-roblox-totaly-safe-and-free_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/como-hackear-un-juego-de-roblox-desde-ordenador_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/blox-rewards_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-roblox-accounts-and-passwords-2021_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_off000031cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CC 22188 bytes
SHA-256: f6b7abb52a0ea9cfd288ed1c1da2e075d98b9ed3b23bc957e256836c39f6f96e
font_01_sfnt_off000062fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 18840 bytes
SHA-256: bfa74a5eda28881e9308f4be3941fc30d3546b7d556835e2b2e73e76830f2da7

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