Malicious PDF — malware analysis report

Static analysis result for SHA-256 13df43031090fa72…

MALICIOUS

PDF

33.8 KB Created: 2021-06-28 09:57:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3a84a509cae718b0004748e33efaebd4 SHA-1: 1b47ccd430a8505c9a02580678284a8f2f683435 SHA-256: 13df43031090fa72fc6c9865e4ffbaba255b2bb082afed7e34bf7eb5ed172de1
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.co/app/431946152/free-crown-roblox-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-copy-remote-functions-hack-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-on-roblox-to-get-money-for-blox-burg_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-murder-mystery-roblox-to-download_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-jailbreak-hack-deutsch-auf-pc_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/daily-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/hack-coin-master-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-parkour-hack-8-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-site-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-roblox-with-cheat-engine-64-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-high-school-how-to-fly-for-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/vampire-hunters-2-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-me-robux_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_off00002f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F45 21936 bytes
SHA-256: bfe0d3b15e734ae37a664b954e88c2a7c9e612f58a61c213f58d7135543093ed
font_01_sfnt_off00005fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB9 18812 bytes
SHA-256: 42cde857707dfaac7a934946723dc07650442f38609872656e544f719456a616

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