Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8e1f2846b25e04e…

MALICIOUS

PDF

36.7 KB Created: 2021-07-03 16:16:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c6420a9ab6bddbc4bfdc8adca567ca0 SHA-1: 131ffb6338a09b422e1ccfe8683037a33b384dd3 SHA-256: f8e1f2846b25e04e31bde2f529c25b4d79b6d576c6f9224c66c3e906008f9d5c
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/games-like-coin-master-for-free-game-hack PDF link annotation
    • https://fib.ub.ac.id/sac/repository/dead-winter-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-clothing-roblox-templates_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/counter-blox-roblox-offensive-hacks-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-free-robux-tool-created-by-hypernova-safe_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/sondage-for-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-accaunt_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-money-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-scripts-for-roblox-electric-state_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-follow-hack_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_off000039ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39AC 22760 bytes
SHA-256: fb41663c879ce70be6e89982720a2e822d720c4b100a7dd872256d203eb14ca1
font_01_sfnt_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 18428 bytes
SHA-256: 7b60c1294d997f04f61e5608f4fda5ea7312313d385ffeed54d843e5d07233f5

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