Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a766021e6697db7…

MALICIOUS

PDF

35.2 KB Created: 2021-07-04 08:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2128b71f50375c9c75a0ebbcc43c1a8e SHA-1: ff3fdb22f3316ce7f04f7701bf615942ae84ae25 SHA-256: 0a766021e6697db7f33bf5a39d4539367a12d261246a31caebde41d675bf738a
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/406889139/online-coin-master-free-spin-app-game-hack PDF link annotation
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-to-get-hammer-tool-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/pubg-uc-versus-pc_GM1330123889.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-to-hack-a-roblox-user_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/free-robux-nunchuks_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/wie-kann-man-roblox-hacken_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/buy-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/airplane-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/gun-giver-roblox-script-lua-hack_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • http://www.kdlscaffolding.ie/uploaded_files/userfiles/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33B8 22932 bytes
SHA-256: f237ed830cea3d6ccff32d9d2c43fba52fafd4cb739fe68226bd7878a66bfa41
font_01_sfnt_off0000674a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674A 18248 bytes
SHA-256: 8511f034c042b64c11128f6e64b973dd4e7735d2e311e35d0d6ef7240f4bb090

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