Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ae6cb239beb8fc…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 20:34:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: dcec03adc78d63d807df114cc3ae1b81 SHA-1: 45d07d74f3242624d0d5228f32ffadba199f4d41 SHA-256: a3ae6cb239beb8fcfe4b01c7a1c6869f8a2f28d8c12b06319e2c128853c54aeb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 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/free-robux-hack-us-game-hack PDF link annotation
    • https://lamgiangservice.com/ckfinder/userfiles/files/roblox-avatar-free-hair_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/tiktok-free-trial-likes_GM835599320.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-hair-for-avatar-in-roblox_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/newo-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-minecraft-skins-xbox-one_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/roblox-cheat-engine-table_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/free-robux-scammers-to-troll_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/find-the-code-and-get-400-million-free-robux_GM431946152.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://lamgiangservice.com/ckfinder/userfiles/files/coin-master-hack-without-downloading-apps_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
font_00_sfnt_off0000337e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x337E 22228 bytes
SHA-256: 1db213f847a46a488688d042bfa69e67aa5c8ae1bba7d560ec0a6ce4cce91596
font_01_sfnt_off000064cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CC 18884 bytes
SHA-256: bfc674629a4fdfc233a3c1a19cbee54387e60bd0cdfc4a3107778b42d9fa82d8

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