Malicious PDF — malware analysis report

Static analysis result for SHA-256 82652d93618da8a6…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 13:50:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 23f1010b135f54a6c0e53d5dae17106a SHA-1: 218e15516b4c972e1a0c61e510c26e241626e9cb SHA-256: 82652d93618da8a64dbcbdcb0e3166edf08afccfdc1398a2bb069533875f43b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/how-to-get-free-robux-website-game-hack, is a known redirector for potentially malicious content. While no scripts were directly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to external, untrusted sites, likely for phishing or malware distribution.

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/431946152/how-to-get-free-robux-website-game-hack PDF link annotation
    • http://perpus.masda.ac.id//repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/a-free-robux-site-that-actually-works_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-hack-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-dungeon-quest-get-unlimited-gold-and-free-vip_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hacks-for-computer_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-free-school_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-counter-blox-roblox-offensive_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_off00002eff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EFF 23784 bytes
SHA-256: edb197552ada6133080ef3ff7f2d3d5741d7139542c6b301142d19fd29dfaaf3
font_01_sfnt_off0000650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 19304 bytes
SHA-256: c93debd830b422eae21ec10a608c2d09d6fed7207bb4c45cee900aa0b721bbbd

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