Malicious PDF — malware analysis report

Static analysis result for SHA-256 33717dbb2745d478…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 22:42:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7ded3aedf3fe0e9d83fbe7525d0a5846 SHA-1: cf6c1903a35fc60509f9d5659dfed0b935ee1414 SHA-256: 33717dbb2745d478c6de7e64c1f4eac126972f71c97497871747a8350eb8431b
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 0.9796

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 https://netcdn.online/app/431946152/roblox-free-vip-server-game-hack PDF link annotation
    • http://perpustakaan.pn-raha.go.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-diamonds-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-raha.go.id/repository/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54FD 25412 bytes
SHA-256: 468b66dfcfdd9880750d7c045ac165dd6e23e68753b8997cbd45625ea48e25ba
font_01_sfnt_off0000903c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903C 3928 bytes
SHA-256: 8d468dff01b00d6af4779de64854b9c063026fd4ee7adeedc13719d1ed98718e
font_02_sfnt_off00009d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D24 18492 bytes
SHA-256: 1efcb06d77819d5fa3ff728d904b801bcae5178dc1aecdda37cae25940162132

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