Malicious PDF — malware analysis report

Static analysis result for SHA-256 964a32300ac0c1c5…

MALICIOUS

PDF

33.4 KB Created: 2021-07-03 18:10:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f8a105c196340cc18f81a02d2c2131cc SHA-1: fae5a61e2155b21febdce6ab14ea6f119be7fa65 SHA-256: 964a32300ac0c1c5ff3defe15f7644ba6c284ad768f9d42c0cf2c4e79453b9f9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'free generator / game hack' redirector, pointing to a suspicious URL. The document body also contains this URL and related keywords, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

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/rbl-gg-free-robux-game-hack PDF link annotation
    • https://www.sun-a.com/ckfinder/userfiles/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/coin-master-free-chip_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/pokemon-go-free-coin-promo-code_GM1094591345.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://www.sun-a.com/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-chromebook_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_off00002df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF7 21840 bytes
SHA-256: 10a033dc322b8ffb1b709e6c9f073bc0745bfcf1d0af1ec9ecea70f81e17d3d2
font_01_sfnt_off00005e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E39 18788 bytes
SHA-256: 59f9ca33a2a7e44c47b5adabbc3ceacc3a6bbd6ffe2d0380a638199fee6fbfd8

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