Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c2cc5501599f3e5…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 23:20:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 47f569e1647f7ab31903f97679fe7257 SHA-1: c05c4959e6cff9a503620486fe57512820cfc34a SHA-256: 3c2cc5501599f3e5a3655217a6781b355af18b5cf33861a04b8a093a6bf23de5
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9969

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/toolbox-for-minecraft-windows-10-game-hack.
  • 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 https://netcdn.xyz/app/479516143/toolbox-for-minecraft-windows-10-game-hack PDF link annotation
    • http://www.thecoffeebaron.co.za/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/freespins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://www.thecoffeebaron.co.za/images/how-to-actually-get-free-robux_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_003_off00004baf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAF 25328 bytes
SHA-256: cc4ba568ad7017eded761a75dddef0d59ccc66abebd4dfa9aec39f85a2ff8a3e
font_01_sfnt_off00008615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8615 18968 bytes
SHA-256: d46e351321a59792d0dfcc693b7f7d925f1f4cf90c5f01a19a24ca355f4b74b5

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