Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e9c0b32db5f929…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 21:22:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 75cbb05914912dd29832b179a3eee862 SHA-1: 2611b842268254adf81109d3839ceee38ebb6f43 SHA-256: 55e9c0b32db5f929829662a0a27f77c7f11e80fe6856839bce111cd4a3e80752
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple links disguised as game hacks and free currency generators, which is a common social engineering tactic to trick users into visiting malicious websites. The primary lure URL is http://netcdn.tw/app/406889139/haktuts-coin-master-hack-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for JavaScript execution or redirection to exploit kits.

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/haktuts-coin-master-hack-game-hack PDF link annotation
    • http://www.pspmrsmkkb.com/webopac/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-free-download-mobile_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/cheat-roblox-blood-moon_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-rich-accounts-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/schoto-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/blox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/wurst_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/hacking-roblox-dll_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkkb.com/webopac/repository/blogspot-coin-master-free-spins_GM406889139.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_off00003305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3305 22556 bytes
SHA-256: 6faa1f37de1ddc5ef739361d3ddae14921d679ca96bed554a8a0c9ddebce6479
font_01_sfnt_off00006521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6521 18144 bytes
SHA-256: 7af4f5aa78d431c9967afade13530042deab11371d440c57f3259e725ceeac7b

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