Malicious PDF — malware analysis report

Static analysis result for SHA-256 f82b14e5a048ff33…

MALICIOUS

PDF

34.1 KB Created: 2021-06-30 10:05:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8924513d58d3096ec3355fa8eebc508f SHA-1: ff1d1a5deb1a9d62daa1c98513a4971bb4efbe37 SHA-256: f82b14e5a048ff336f0c9d8291e8c09e0ccd7e8d136f58c5ca5ddc9189da71b1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'Hackeando Mi Saldo De Roblox Sin Pagar' (Hacking My Roblox Balance Without Paying), directly linking to a URL that promises game hacks. This indicates a social engineering tactic to entice users to click malicious links. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious websites for further exploitation or phishing. The ML classifier strongly supports the malicious verdict.

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/hackeando-mi-saldo-de-roblox-sin-pagar-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-hack-username-and-password-on-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/wurst-commands_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/no-human-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-building-tools-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-site-17-hacker_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-coins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/kuso-icu-roblox-hack_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
font_00_sfnt_off00002d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D42 22392 bytes
SHA-256: e2095989e6983043e439f77cf4d1c010eec1cb6802aaad2a588f314cab10e679
font_01_sfnt_off00005f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F05 19468 bytes
SHA-256: 7dbfc84267336e9b2213f07a4125a1212d9cf06cbb813c25ddc0bd22c1b8f568

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