Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3be689508c88e97…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 02:58:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fd040854c53b79527255cdbdf3ac8dd2 SHA-1: 4ef2c796bf7b54b6f04eebedd153f75bc0c8b9af SHA-256: c3be689508c88e976bfacda5f0f4ced993a36b818b90196b86bab290570605f3
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/406889139/100-free-spins-coin-master-2021-game-hack PDF link annotation
    • https://admin.9credit.vn/data/files/how-to-get-robux-free-on-ipad_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-membership-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-free-fgteev-t-shirt_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-hack-coins-in-roblox-mm2_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/hack-file-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/comandos-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/doungon-quest-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-weight-lifting-hack_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-muscle-legends-cheat_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-the-crazy-elevator-free-toilet-dhlc_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-scam_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://admin.9credit.vn/data/files/free-robux-yahoo_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B5 23024 bytes
SHA-256: 1491a40cbd21360d2edd6c23e598f512a98abd4e2647415892f3912a5d60dac6
font_01_sfnt_off0000678d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678D 18576 bytes
SHA-256: 92d497f8bb7a4b7cecbf731ebca98dbb8eaec3bbe78b3fd35d47c848e72ff159

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