Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c806af86a98f81…

MALICIOUS

PDF

36.2 KB Created: 2021-06-19 22:16:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 705f0cabb8b0c7830a8017ccf3d08ee5 SHA-1: 11851a93bfa5da000165494c66ed2676a8efdfdb SHA-256: d6c806af86a98f8149cc08432df9b2a921ae81fa9e229b9b0894f6a995d8e857
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.co/app/431946152/free-code-for-huge-cat-pet-in-roblox-game-hack PDF link annotation
    • http://proyetec.com.co/aym_image/files/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-how-to-get-free-clothes-no-bc_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/how-to-get-free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/coin-game_GM406889139.pdfIn PDF document text
    • http://proyetec.com.co/aym_image/files/free-minecraft-account-generator_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_off000033d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D9 23220 bytes
SHA-256: ceefc093b13b52e398f05fa7f2a325da878ea5a93ae8f0f460ebe18e2b42835b
font_01_sfnt_off00006832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6832 19224 bytes
SHA-256: 12c92805078fab892ffbc3de712ed9e1062effd962e0e986416be7db46b8b91d

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