Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dc9364bd843513…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 17:58:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 88d41369b94c1ca1afa3f141608514bb SHA-1: f5d0ac210cb374b4a5f0b76608c3c7391c8ca13d SHA-256: 15dc9364bd843513687bd2f3fc192f68eee7eef80ad185fe9269ff8b43c9361e
122 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA and a download button lure to deceive users into clicking a malicious link. The primary link, http://netcdn.co/app/431946152/acually-working-robux-hack-game-hack, is associated with a 'game hack' generator, indicating a probable attempt to deliver a second-stage payload. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/acually-working-robux-hack-game-hack PDF link annotation
    • http://opac.salatigakota.go.id/slims7//repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/pastebincom-roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-denis_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-roblox-accounts-with-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/corrupt-free-roblox-torso_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/redline-cheat-roblox-download-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-robux-download-pc_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/robux-hack-with-inspect-element_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hack-emote-dance-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hacking-roblox-through-cookies_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7//repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/hacks-de-dragon-ball-rage-roblox-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-draw-game-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/free-non-virus-recorder-for-roblox-for-laptop_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/cheat-roblox-en-francais_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-free-robux-ad-on-youtube_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/how-to-get-robux-free-no-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatigakota.go.id/slims7/repository/ive-been-hacked-on-roblox-what-now_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_off0000321c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321C 22148 bytes
SHA-256: 4be0981bb0a4175803e33773f2590620ab24075d3529ba379d6fc52bb98bee08
font_01_sfnt_off00006353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6353 19296 bytes
SHA-256: 57c68e753ee611378a9862dc70a202292a391ee267fd1e116252f89e09375f3c

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