Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8172629659ac96…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 01:43:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e99f5957aaa83c8d60063974f7070a1a SHA-1: aa2fd758eb3d594539a38bf881c1957f4c90b2f3 SHA-256: 5b8172629659ac96ca8e2ae6fdad25c2415f2a30e8ca93083fb651901b03fcab
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-roblox-codes-wiki-game-hack PDF link annotation
    • http://digilibfisip.uwks.ac.id/repository/call-roblox-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-supreme-roblox-model_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hacks-for-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-admin-hack-free-download_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-someone-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/buy-robux-for-free-games_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-cool-free-avatars-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-the-snowman-package-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hacks-para-roblox-dragon-ball-rage_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-vip-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hack-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-roblox-boxing-simulator-2_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-game-publicity_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-ll-robux_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-cheat-codes-for-gear_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_off00002fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEC 21640 bytes
SHA-256: 3bb25a9d21a20b4f08069a7e3bb87c50bfeeb43f512f4e366ea47734f0f51373
font_01_sfnt_off00005f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9F 19312 bytes
SHA-256: 70c865c133d97239c6f526b29a5b58756b34a1886cba1e9ef470644f2366d297

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