Malicious PDF — malware analysis report

Static analysis result for SHA-256 811047baa5fffeff…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 18:32:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: fbedc04d6fcca4018bdc0375fbe28a4f SHA-1: 7a4ce25b263d5a4a5a8904dd39f222d3c707ef6b SHA-256: 811047baa5fffeffcc56ca578ec498b3a8015658bb48bded433cce890d2477eb
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 0.9980

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.tw/app/431946152/free-roblox-adopt-me-accounts-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/tiktok-free-folowers-joker_GM835599320.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/robuxin-robux-hack_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/cute-drawings-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-apocalypse-rising-cheat-codes_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-prison-life-v2-0-cheats_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spins-link-2021-today_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
font_00_sfnt_off00003245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3245 22256 bytes
SHA-256: f40fd683159acd9d1abde6199a7aefe56d64c2d9f6f8ce6a242df751c63a0ffc
font_01_sfnt_off000063d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 19440 bytes
SHA-256: 88194e20aa1d794cbfbc6ec60bdf20d6817b6f04f409d3f051b45d150e534ec5

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