Malicious PDF — malware analysis report

Static analysis result for SHA-256 3909f0aee5743fe5…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 09:57:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a740d4f92d67da9c6f70be6d39d5d17d SHA-1: 83e858e5964ed8d25162d4e198b426e0ade54304 SHA-256: 3909f0aee5743fe50dd4038d89a6d801c415ad29c1bb9aec5e11e5bde1605bf6
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF contains a large number of external links, many of which are SEO-optimized lures for game hacks and generators. The primary link directs to a 'free roblox executor' which is a common lure for malware or phishing. The document body and heuristics strongly indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-executor-game-hack PDF link annotation
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/hacking-jayingee-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/how-to-use-hacks-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-roblox-gift-card-codes-not-used-2021_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-sued_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-robux-app-no-password_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-free-clothes-in-catalog_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/free-rich-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/roblox-taxi-simulator-brick-cars-edition-give-all-cars-hack_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/help-my-roblox-account-got-hacked-and-dosent-have-security_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/sondage-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mesjidgedhe.or.id/perpuskauman/repository/robux-claimer_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_off00003185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3185 22340 bytes
SHA-256: 0e76579b267b57d06a8f64cc10988fd42c022e7809233c6f3fa929a3cbd192bb
font_01_sfnt_off00006354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6354 18896 bytes
SHA-256: 3b19af6b5ded182f4e9457a38b804eaf1e4f69130259631d736f6f85c05e9c55

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