Malicious PDF — malware analysis report

Static analysis result for SHA-256 db77ab7a2f0d1574…

MALICIOUS

PDF

34.6 KB Created: 2021-06-17 16:17:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 97f5f316e72d4dc25dc6919d9d30ac99 SHA-1: e8007ff94fe746f2368717954aa7f43c9d82e338 SHA-256: db77ab7a2f0d1574ff37873fbb10d313728c964ceec36cc05f4554251ad41a36
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' or 'game hacks' to entice users. It contains multiple embedded URLs, with the primary one being http://netcdn.co/app/431946152/free-robux-generator-hack-best-voulu-game-hack, which likely leads to a malicious download or phishing page. The ML classifier strongly indicated maliciousness, and the heuristic firings confirm the use of a redirector lure.

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-robux-generator-hack-best-voulu-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/guava-juice-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-2021-sans-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-use-a-script-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-robux-no-password-for_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-no-downloads-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-robux-with-cheat-engine-65_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/conseguir-robux-gratis-sin-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/pokemon-go-free-83_GM1094591345.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-skins-download-free_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
font_00_sfnt_off00003110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3110 22176 bytes
SHA-256: e1ffd8c564b842a33fa0bd820ac5cb01495ea4be992a26c3f652ed70e1ce11b0
font_01_sfnt_off0000625f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625F 19012 bytes
SHA-256: e86784327965d82f6b4ac87d2510cb322a40591f2bdcc7e4989ffbbc4affdc55

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