Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf219f0086f4ca5…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 17:23:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 800638e59f8b01282e0bf6ffa4c10e90 SHA-1: 67a2bc93212737cf30c41b3db5f51faa7fa0e767 SHA-256: fbf219f0086f4ca5882507a0922b4beb2656e3b2027f0217a65b1a0f8613bec9
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/rbxoffers-com-free-robux-game-hack PDF link annotation
    • http://windhorsetrek.com/userfiles/files/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/fnaf-roblox-songs-cheats_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-tricks-cheats_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/cool-free-roblox-charecters-uu_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/www-robux-redeem_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/bypass-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/send-me-500-2021-spins_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/pastebin-link-for-free-robux_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC7 22108 bytes
SHA-256: 0d7841fe59f61af41b2a65ead576428db89d5c1708caa29ab750b66ea727a1f4
font_01_sfnt_off000060f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60F3 18976 bytes
SHA-256: a0223b82be68661a8b22d1b4f0340e8af90fd6b3faac36c3bfc3d0e3dd614ada

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