Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fa24dd16e7299bc…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 15:24:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6e73e52929dd4ddcbc3ef73ede5d7b7a SHA-1: aa2339ef72dc3b0ef4e5dce9e6be3cbf1d016b3b SHA-256: 7fa24dd16e7299bc0568daf736e923055d4931f90112659b52137d8d0c85baae
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-robux-for-kids-no-verification-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/youtube-how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-coin-master-spins-and-coins-for-daily_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/hack-turkey-roblox_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/fbchampion_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-executor-free-download_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/village-coin_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-texture-packs-free-download_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
font_00_sfnt_off000030aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AA 22664 bytes
SHA-256: 547dde8da7ca4dba6a593a9e0853da3545b474712753b3b76ce716d334201792
font_01_sfnt_off00006319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6319 19248 bytes
SHA-256: cfee841a5dae106b2cf9b4cdd4f4599820923438d7b3e36504f4b087b21eb8e1

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