Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d7e57d66e0464e7…

MALICIOUS

PDF

51.7 KB Created: 2021-06-11 08:50:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a57c7550f675a723a58465a4f45a083d SHA-1: 6c4ef090b5aa24d464c0a17ee24a4a9f7a2422d2 SHA-256: 0d7e57d66e0464e721a9e2c86179f52efb16e695d555311531022c8a3520354a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9464

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/roblox-hacks-for-mac-2021-game-hack PDF link annotation
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/roblox-prison-life-noclip-hack_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/minecraft-ios-mods_GM479516143.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/legit-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://urbanposthotel.com/admin/ckfinder/userfiles/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000555e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x555E 30316 bytes
SHA-256: d0840e1a79a3f40d149f4b1a73d3ec37c6a47ec8374dfe3337827ae425a7e2ab
font_01_sfnt_off00009bc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC8 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000a5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5B3 18944 bytes
SHA-256: 7ac07c6219fd7e17feae7e1eeebb1bb4c85bfff00b2b20702d63eca6549831fe

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