Malicious PDF — malware analysis report

Static analysis result for SHA-256 837e61641c5007a7…

MALICIOUS

PDF

36.7 KB Created: 2021-07-03 14:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ee1ee8234c581007e055469a64451dc1 SHA-1: 60887f0b597df523c03ff70a7b99ba0d0a151f78 SHA-256: 837e61641c5007a754150cd74e86bca62c4e06f061e36e1d7536895128a92212
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-xbox-one-edition-digital-code-free-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-pins-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-suit-t-shirt_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-hacked-kids_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-sprinting-simulator-hack_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-generator-unlimited-hacks_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/cheat-roblox-apres-la-dernire-mise--jour_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/good-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/extra-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-spam-sentenace_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-shrek-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-camera-script_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-with-no-games_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_off000035d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35D2 23336 bytes
SHA-256: 80d2a5e1e860e6b00d094e663d8d72ae4bf06467188325a49f68905420c5d036
font_01_sfnt_off00006a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A9A 19008 bytes
SHA-256: fdc182bbb0097015eb5c04957e9722c28c9e7580ee65fff8630002b28e8f7f3d

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