Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b59cedcd5571a3b…

MALICIOUS

PDF

33.3 KB Created: 2021-06-26 07:53:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 153e710b4480fac46653e0a3c2ab4bb3 SHA-1: ed9dcae1eb59f5ad8e299f5f1c7852b20874aab1 SHA-256: 2b59cedcd5571a3b05d29308e7ac0825bdd118a57e7646dfb148db4fa0bc6432
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.co/app/431946152/frobux-free-robux-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-login-password-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/android-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-iteams-in-roblox-using-to_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-robux-hacks-2021-no-survey-no-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/como-tener-hacks-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/wurst-mc_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/ways-to-get-robux-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/buy-for-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-in-1-sec_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_off00002cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD2 22172 bytes
SHA-256: addd837a357d71790a9ec543963c418494496434654d055ed1b6a3b2d3db8deb
font_01_sfnt_off00005e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E15 18716 bytes
SHA-256: 41490e225d0049174701a8874b543fa01b523c4d704dfe46b4a3455163861833

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