Malicious PDF — malware analysis report

Static analysis result for SHA-256 80f4d830ce55dc71…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 12:51:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: db2df10e860ce668e9d4b146971b99fb SHA-1: 6abe03686175fd4cb1150a9b00faabc5a23f2db7 SHA-256: 80f4d830ce55dc71568c3b107d6593440676be611eebe8cf6a5f5e3e48c04bdf
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action lure related to 'free Robux' and game hacks, strongly indicating a phishing or scam attempt. The primary link, https://netcdn.xyz/app/431946152/how-to-get-free-robux-easy-no-download-game-hack, is presented as the main lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-free-robux-easy-no-download-game-hack PDF link annotation
    • http://www.eucorro.com/arquivos/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-pe-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/master-8-ball-pool-free-coins_GM406889139.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_off00004589.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4589 26056 bytes
SHA-256: a04e88e1e2845974b26dc07126118c6f0fbd0497bfb07bc5d254f600f7f9729e
font_01_sfnt_off00008040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8040 19108 bytes
SHA-256: 7bc61c49a0b734df4d56b9cb8c894117daf111bfa68c773dcc76edca8f070452

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