Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca3d80c97d0a8fe8…

MALICIOUS

PDF

44.5 KB Created: 2021-06-09 06:39:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c1b7cf1c57ce1bdcd863ceb1da595b8 SHA-1: db5b1cc222a4c545fadd0c10d7e447c53282127b SHA-256: ca3d80c97d0a8fe8f27e041ef511eb35c1a3cea5e22b15771269a4c1ca110da4
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 0.9865

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.tw/app/431946152/free-ninja-animation-roblox-game-hack PDF link annotation
    • http://elibrary.fl.unud.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-34-4-hack-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-get-bloxburg-for-free-without-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/robux-free-giveaway-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-map_GM406889139.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_off00004e7e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E7E 25908 bytes
SHA-256: 8e806b524290538de9cb1376d9a4b485d2398bb3b64a77f14d467048c45ded83
font_01_sfnt_off000089b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B1 18848 bytes
SHA-256: 9dabb32d5eaf2b2e5e103a2cc6d69665f9ee03aad3906605d63bd86ccf940b12

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