Malicious PDF — malware analysis report

Static analysis result for SHA-256 069bc37f5755faae…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 21:10:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6504dd221ddf63297785115d6f86ff34 SHA-1: 2911861548fef392ff523aedbf200fd00fc635f0 SHA-256: 069bc37f5755faaeaa74d2f4ff21447fc2aa9ff79c3790c2d0713ad13a225101
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and a fake CAPTCHA prompt, aiming to trick users into clicking malicious links. The embedded URL leads to a suspicious domain associated with game hacks and potentially unwanted software. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interest in free game cheats to redirect them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.online/app/431946152/free-robux-gen-game-hack PDF link annotation
    • https://kojak-group.com/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-generator_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-google-play-promo-codes-coin-master_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_004_off00004e61.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E61 25860 bytes
SHA-256: 8ead24d8d345b6b00b8c252bf53e2eb53eb1e80327f0e64e9075d5d14dabf3c9
font_01_sfnt_off00008a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A88 18012 bytes
SHA-256: b822dfaf3b200acc051a64c4c7a9b8bc6e1a7e93aa10f3c17b5d396512734dd6

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