Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b73d93d0407964…

MALICIOUS

PDF

41.7 KB Created: 2021-05-12 05:05:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 62608d6b4499af673d3f6c86883d00bd SHA-1: e9747e480e51936ed556de03469febd9d4101910 SHA-256: 40b73d93d0407964639a69c19093208121bc0dea4049b2571ae5c90831c4c8a1
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 0.9971

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.xyz/app/431946152/free-robux-scam-game-hack PDF link annotation
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-old-avatar_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-play-now-for-free_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-coin-link_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-2021_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_off0000493b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x493B 24036 bytes
SHA-256: 9b058413019bab6801c4d47f6325c587e991345cd568294e149c5fc62012207f
font_01_sfnt_off0000801b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x801B 18500 bytes
SHA-256: 24c52a02bd601b0a5cf869202747d5c16280e540771a7d3b3f68f33a5cbf68e3

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