Malicious PDF — malware analysis report

Static analysis result for SHA-256 01c1a7501763d644…

MALICIOUS

PDF

34.6 KB Created: 2021-07-01 06:45:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f5948db8b43859efe66c323e522f75df SHA-1: 009e1ecf79d29f496566b7857e9b706ac13f31d4 SHA-256: 01c1a7501763d644fd2bb4f502d2c645bb0d57ac31a1dbb20c9e8e344ed5e132
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and redirects to a suspicious URL. The ML classifier strongly indicates maliciousness. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to trick users into visiting a site that likely hosts further malicious content or exploits. The primary IOC is the redirect URL, which is presented as a 'game hack' lure.

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/youtube-how-to-hack-free-robux-game-hack PDF link annotation
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/nuevo-hack-16sept-generador-de-robux-by-piignoiise_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/cheat-table-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/gear-online-hack-scripts-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-the-marshmallow-head-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/robux-page_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-robux-no-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-pe_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hacks-for-roblox-case-clicker_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_off000030a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A8 22020 bytes
SHA-256: ec8d96807d6894cfd28dbcc6262cf835d07966be21bc831c890308bcb14a33fa
font_01_sfnt_off0000614d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x614D 19316 bytes
SHA-256: 6b0b91730371d4b8c81dedb5093e5e2c60e748f400a3b6be1e2166d294fc8d6f

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