Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6ea1da65b516da…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 14:15:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 291e89be73da0e6f62f2a576b0705b57 SHA-1: b9f1635c5007a97d20180b3288baaa0e95ba9bf6 SHA-256: 1c6ea1da65b516da96199499d2b95d0f4a2c1288157491c3c0d05744cd464aa2
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/406889139/free-coin-master-spins-and-coins-for-daily-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-prizes-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-script-roblox-and-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-faces-names_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/gainblox-gg-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-asssassin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/vbbwcom-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/hack-master-coin_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/cheat-argent-roblox-vhicule-simulator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/btool-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-google_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
stream_002_off000030ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30EF 22744 bytes
SHA-256: ef5dbf96fbe12c4acb196a08f45d80b92b4599821817910cc0d7e5637249edc2
font_01_sfnt_off000063ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AC 18772 bytes
SHA-256: 365855f7de952552b9039cbc2e136aa4af0f445550e3e4c110e0b89cb5a86d06

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