Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fdf18559c6cd87c…

MALICIOUS

PDF

46.5 KB Created: 2021-05-12 22:00:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3fa452c9e9337cd08921723bb474959d SHA-1: 9af1ced78aa0c05fd0840061ed84762c8e155001 SHA-256: 3fdf18559c6cd87c0e296da0f6221160f46431e22556ae4158026b24b4c7140d
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 0.8948

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 https://netcdn.xyz/app/431946152/free-robux-codes-2021-game-hack PDF link annotation
    • http://piadaandco.it/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://piadaandco.it/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://piadaandco.it/images/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://piadaandco.it/images/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://piadaandco.it/images/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://piadaandco.it/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://piadaandco.it/images/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://piadaandco.it/images/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://piadaandco.it/images/how-do-you-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/minecraft-free-education_GM479516143.pdfIn PDF document text
    • http://piadaandco.it/images/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://piadaandco.it/images/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • http://piadaandco.it/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://piadaandco.it/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://piadaandco.it/images/hack-free-spin-coin-master_GM406889139.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_003_off00004a02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A02 26876 bytes
SHA-256: 5117c40c8ab59e1bce40c23be1210df341736dc089e277268d0b6c8fad1b9398
font_01_sfnt_off000087e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87E5 2984 bytes
SHA-256: 889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc
font_02_sfnt_off00009211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9211 18588 bytes
SHA-256: 0c0011b59677f21f59199ad7d2a82948105ed154610022cedcbab6f052c91d55

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