Malicious PDF — malware analysis report

Static analysis result for SHA-256 1741f1de8ea5ada1…

MALICIOUS

PDF

43.0 KB Created: 2021-06-03 13:46:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55d1e5e7fd8f8a8b51245adec6efa7df SHA-1: 1a3e8c05bd01089a782a926eb509f1f76eef1d0e SHA-256: 1741f1de8ea5ada1b427b197c0896ce0890094d9cd99d3c66ef6c377b75cd247
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 0.9874

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.online/app/406889139/master-coin-hack-app-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/freecoins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-roebucks_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-online_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-tiktok-followers-without-verification_GM835599320.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/wurst-client-18-9_GM479516143.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
stream_004_off00005046.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5046 23928 bytes
SHA-256: 4ae137609b5a68081cb7091c6d44377ec81ffe364d7082f889abb69de5474ec5
font_01_sfnt_off00008698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8698 17892 bytes
SHA-256: 41282dcb1c000e988ea8b2199b00347d54e117e16c55148ab4165d720f01bc1d

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