Malicious PDF — malware analysis report

Static analysis result for SHA-256 da439b26d468033e…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 17:57:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2a474accce0d9a5ff7d70d0f5d568770 SHA-1: 81573330a0ac5fc7f8b3dd0e0bf42b0cbab6b741 SHA-256: da439b26d468033e3ac9959ec576639f6a2590e3c2ccc4724b6d707daa692e42
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/431946152/microsoft-bing-free-robux-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/cheats-for-big-paintball-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-roblox-group-ranks_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/i-love-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-script-pastebin-10-29-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/jie-gaming-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-script-game-guardian_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-on-a-phone-easy_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-hack-jailbreak-noclip-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/invisible-skin-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-downlow_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-clothes-cheat-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/www-free-robux-me_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/game-test-roblox-free-bc_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-roblox-accounts-2021-with-wire-shark_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-hack-mobile_GM431946152.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
font_00_sfnt_off00003016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3016 21668 bytes
SHA-256: 3ed9be22aabd34f51f1a78ab3eae1428a0f5eb739e5b7dde6427b15196ee38a5
font_01_sfnt_off00005fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC2 19136 bytes
SHA-256: 6574868ecd516cdc95e6406792cdbd3216c6b5fe6b50fcaddc0876f557b9cdc5

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