Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7709cbfe9dc0788…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 14:13:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 628cc87052d9273bb877e2935102f659 SHA-1: 4513b42236e4d19e9b996af03127e80c2599fd9c SHA-256: c7709cbfe9dc0788f156b0ff21c0c36ebdd70b503b6ef25eaf2e34d91134e034
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'game hack' redirect lure, strongly suggesting a phishing or scam attempt. The document body and extracted URLs point towards lures for game cheats and free currency, designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow, likely involving redirection to exploit kits or further phishing pages.

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/406889139/coin-master-admin-free-spins-game-hack PDF link annotation
    • https://www.gornjastubica.hr/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-expert-scripters-roblox_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-tiktok-coins-2021_GM835599320.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/roblox-restaurant-tycoon-money-cheat_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/10-robux_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/injecthack-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-hack-tool-robux_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/774-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/gift-cards-free-roblox-march-2021_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/cheats-roblox-tickets_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/pokemon-go-free-stuff_GM1094591345.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-time-speed-hack_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
stream_002_off000030b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30B0 23408 bytes
SHA-256: c7d20cd9df65f04c5e0a485b49bafd0b500e38fc40c8716f30b33f3bd91079ac
font_01_sfnt_off0000654d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x654D 18608 bytes
SHA-256: 74edf7415fe65f65c803a4c6dc19b7b5de8e24f681e29ffeea91b4e7cb3e99bf

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