Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6762090d3be1d3a…

MALICIOUS

PDF

46.5 KB Created: 2021-06-01 07:14:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 700553f69e3c75b3700b386fad8a3d8d SHA-1: ff15ae6e92a98ffbeb99d69bf876cc69a946436f SHA-256: c6762090d3be1d3af972b220889b66e437d43cf7b23cd8d12813bb0f5cdbb8ad
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lure users with the promise of 'free Robux' or game hacks. These links redirect to external URLs, such as https://netcdn.xyz/app/431946152/free-robux-no-download-or-survey-2021-game-hack, which are likely intended to host further malicious content or phishing pages. The presence of multiple related PDF files in the URLs suggests a campaign distributing similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-no-download-or-survey-2021-game-hack PDF link annotation
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/how-to-get-free-robux-subscribe_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/free-robux-hack-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/how-to-speed-hack-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/how-to-check-if-hacker-fired-code-roblox_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/febuary-2021-roblox-hacking-client_GM431946152.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lavoro.antemar.eu/wp-content/uploads/fsqm-files/minecraft-free-download-unblocked_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
stream_004_off000051b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B7 26784 bytes
SHA-256: e92b1d2f12de1c96fd8001cf0159dc779f926cb07283390ef8e27c701b3277bd
font_01_sfnt_off00008f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F63 19516 bytes
SHA-256: 906f666e701e4330a2477c6dd1f296958316ea05599566e2f7729ffd94671da4

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