Malicious PDF — malware analysis report

Static analysis result for SHA-256 94535f5b3d4d24eb…

MALICIOUS

PDF

37.4 KB Created: 2021-07-06 14:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8de5fac4f7db3599298c36c567bc8f39 SHA-1: 8a6bb31509cac615d6f4f29fdad4c30d7ffb1c88 SHA-256: 94535f5b3d4d24eb5448c77f97910e9b01e8b43623e8823935b8749cc13fc014
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of game hacking and free currency to entice users. It contains multiple embedded URLs, including one pointing to 'netcdn.tw', which are likely used to redirect users to malicious websites or phishing pages. The ML classifier strongly indicated maliciousness, and the PDF's structure and content align with social engineering tactics to compromise users.

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/how-to-hack-coin-master-game-without-root-game-hack PDF link annotation
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-to-hack-in-roblox-jailbreak-2021-mobile_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-rcm-free-trial_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/yt-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-planet-free-robux_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-unused-robux-codes_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-what-do-do-when-account-hacked-and-then-terminated_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-to-hack-anyone-in-roblox_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/roblox-adopt-me-hacks-2021_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-robux-secret-site_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://jogjaindotrans.com/ckfinder/userfiles/files/how-to-get-free-robux-easy-no-download_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
stream_002_off00003876.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3876 23632 bytes
SHA-256: 5e536058e2f46fe11c64974b98a9ed01a0f0bed6e8e102c5a20b7a0b48603b55
font_01_sfnt_off00006e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E21 18932 bytes
SHA-256: 09c7132829cd078d9a38136ec8ce06a43dec18f251ee3210dd6d9bf6bbd0cdcb

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