Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2837358e580bf9…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 20:11:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d169dc8a2b5ba5a04fde7de95bfbacd0 SHA-1: 5fed7b5053dfdeef2301fdaf0e6df592c8b4b019 SHA-256: 5b2837358e580bf9b3efc5d6aca1c9faf66b246b9a9ae8b0aa7467f5721bafeb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/coin-master-spins-hack-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/ssuper-speed-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-site-youtubecom_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/apocalypse-rising-roblox-hack-25-02-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-ios-jailbreak_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-promo-codes-valid-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cool-roblox-outfits-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-anything-free-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-free-online_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-de-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-bypassed-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/download-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/robux-hack-no-games_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-minecraft-for-free-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/commands-for-roblox-free-rubux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-usernames-and-passwords-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-no-download-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_off00002f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F69 22896 bytes
SHA-256: 721e1b64819c923e57f5329e914f178be7a92ee0688c658fab2ff92f1ebd6e14
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 18180 bytes
SHA-256: a132cedd825d849e0d721dfbb1ea0ac908be68f445a4640ebf6ea6c953a82746

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