Malicious PDF — malware analysis report

Static analysis result for SHA-256 b88aa75b2f02efce…

MALICIOUS

PDF

35.8 KB Created: 2021-07-05 21:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b50a3f5402202dc22731973c864edb97 SHA-1: 720e41e538ae728e4ded8c5d83a33d4c71937090 SHA-256: b88aa75b2f02efcef30862551dda20a709343d67c5789eb01a8b0c06877dcfa1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-priority heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a URL that promises a 'coin-master-official-website-game-hack'. This suggests the document is designed to trick users into visiting a potentially malicious site by offering game-related cheats. The ML classifier also strongly flagged this PDF as malicious.

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/coin-master-official-website-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-coins-in-archery-master-3d_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-roblox-card-pins-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/code-to-redeem-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-hack-add_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-server-free-app_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-no-human-verification-real_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/pubg-uc-20219_GM1330123889.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_off000033b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B0 23768 bytes
SHA-256: 1034b41ed1156fdb7bc8d986043fbbb3f8a0dc3939ca211320423062097de478
font_01_sfnt_off00006961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6961 18264 bytes
SHA-256: 1e564645043ee9400a83ff6f3df48d951780316a8efcba22ba5693f484276f83

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