Malicious PDF — malware analysis report

Static analysis result for SHA-256 673ebe291186d8a4…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 03:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d0efe0eb203650b387f65bd1ff25a82 SHA-1: 1ebc5fa16865facfed3a6ef8839d2ae9dfae30ab SHA-256: 673ebe291186d8a443d6deeb8d7fe442480aeeab4c701a972c760543b2c2bc7d
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.tw/app/431946152/roblox-rape-hack-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/mcmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/dungeon-quest-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-spins-coin-master-2021-glitch_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off000033aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33AA 22796 bytes
SHA-256: b212ac47381c0b634e84a987847d37bd5598c35f309258252f8a649f208c3c03
font_01_sfnt_off0000672a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672A 18832 bytes
SHA-256: 3ac3cfabc938180400d0abf1f56cc3fab268d3e1a7375c8f9738c83b811e0b8b

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