Malicious PDF — malware analysis report

Static analysis result for SHA-256 32357cd813b99cdc…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 03:52:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3e3f5cefdd76e39cd3f49f0ac19bbc77 SHA-1: ab03803ac41ae527cbec68edc89a273cb8db6131 SHA-256: 32357cd813b99cdceaa834abdca6be4e14f981bf26fe215ffa0442ef555029ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, specifically mentioning Roblox and Coin Master, directing users to a URL that likely hosts a malicious payload. The ML classifier strongly flagged this PDF as malicious, and the presence of a game hack redirector heuristic further supports a phishing or malware distribution attempt. No scripts were extracted, but the document body and heuristics indicate a social engineering tactic to entice users to click on the embedded URL.

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/check-cashed-v5-roblox-hacks-game-hack PDF link annotation
    • https://radiocaxias.com.br/portal/imagens/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/tp-hacks-script-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-spins-and-coins-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/minecraft-free-trial_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_off00002d84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D84 22460 bytes
SHA-256: 462dbcf8ebc583c98654913daa42f30533ee6f0c0ff881ea11e68c4b0b491db6
font_01_sfnt_off00005f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 19076 bytes
SHA-256: 009920033f7020c5b6970d0aa1290c09af8a0ec1cbe493ccceb3a84fef5010af

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