Malicious PDF — malware analysis report

Static analysis result for SHA-256 daaf8372e3f9b6cf…

MALICIOUS

PDF

36.1 KB Created: 2021-07-04 08:48:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 12efbd0136ea5d23c11be93099599417 SHA-1: d2f942f287f5c6714ac26ef47e3f32f4d797d10e SHA-256: daaf8372e3f9b6cf3fc35a70dd52e02ac9f84fe4ee2568b13c2f246ab97abcb6
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/479516143/minecraft-java-free-download-game-hack PDF link annotation
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-without-verification-new_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/april-fools-hack-of-2021-roblox-wiki_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-clothes_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/pastebin-robux-promocode-hack-2021_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-5-million-free-robux_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/roblox-mining-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-tiktok-followers-royal-key_GM835599320.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-mac_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://smpn1-dps.sch.id/new/public/ckfinder/userfiles/files/free-robux-scams_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_off0000352c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x352C 23088 bytes
SHA-256: 46dc73ae61bb8646cad09ecbde1dd40edfae2eeb7e3da667b9b463f6867af9c4
font_01_sfnt_off000068e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68E0 18856 bytes
SHA-256: b0096c3c5e481a4f2c1c49fcffa9b92b3b8114a7f846d47264883f0ea9db8c51

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