Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1d820449164187…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 09:16:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da1ee849437f6a0830171282c318f6c2 SHA-1: 941f810479068e36153d93f8b5852718f3dcc42d SHA-256: 5d1d820449164187f582a755afb0abd7d88bab027f6be31b3c4cd9b1a13c86f8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, specifically pointing to a URL on netcdn.tw. The document body, though heavily obfuscated, contains similar URLs and text related to game hacks and free currency. This suggests the primary goal is to trick users into visiting malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/www-roblox-com-drivers-upgrade-free-game-hack PDF link annotation
    • http://digilib-unirow.ac.id/repository/roblox-skins-free-download-free_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/robux-win_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-daily-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-adopt-me-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-roblox-accounts-2021-april_GM431946152.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib-unirow.ac.id/repository/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A4 25056 bytes
SHA-256: d8e820ea215eb962651636118cee3f72ffc2effa48ac5ec80bfa3a305a972592
font_01_sfnt_off00008ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE3 20024 bytes
SHA-256: 17c961250a82cf74cf636284dd34bc574cc36621e6873a4341a796bdf0ec88a3

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