Malicious PDF — malware analysis report

Static analysis result for SHA-256 45865cbf6657a6b0…

MALICIOUS

PDF

49.3 KB Created: 2021-06-03 10:49:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8b1fa7d7910e0a32e35d2e1a93be129b SHA-1: 733cca6ef41ac2a7800b65ad4e6401839fe344d3 SHA-256: 45865cbf6657a6b06d546ae6a322e76d57a43082227cfe0d98b7a033199ac65b
122 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Walmart, directing users to a URL that promises free Robux and game hacks. This is a common tactic for credential phishing or to deliver a second-stage payload. The ML classifier strongly flagged this PDF as malicious, and the embedded links suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/431946152/how-to-get-free-robux-for-kids-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.online/app/431946152/how-to-get-free-robux-for-kids-game-hack PDF link annotation
    • https://ifef.es/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-tiktok-views-no-verification_GM835599320.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/client-minecraft_GM479516143.pdfIn PDF document text
    • https://ifef.es/ckfinder/userfiles/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000522a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522A 27056 bytes
SHA-256: 663ad712e60f98ea62676284f1172446787ad2cdd48b3187018e141b134e6a89
font_01_sfnt_off00009013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9013 4016 bytes
SHA-256: d86d7dd4e322525e04c25fcfa6743908eb068b70657cde876d7dc7877c4666d7
font_02_sfnt_off00009d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D2E 18576 bytes
SHA-256: d8259766cf036cd113d0b26237eaaf1c704bfb1290fa2ba3336ef80e6ae93167

Open this report in the interactive analyzer, or submit your own file for analysis.