Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75f267a03eb639f…

MALICIOUS

PDF

35.4 KB Created: 2021-07-02 01:32:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1e843cc7e4feb54f9e612c12f1cd77dd SHA-1: 30f8db3e4f4465ed052258e4bdf5f8fc86863c92 SHA-256: a75f267a03eb639ff0415d1ad6ec678b98004407cba930e88b25c381ff7ecca8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains heuristics indicating it links to a game hack redirector, specifically targeting users with promises of 'Unlimited Robux Hack'. The embedded URL, http://netcdn.co/app/431946152/unlimited-robux-hack-ios-game-hack, is the primary indicator of malicious intent, likely serving as a lure for a downloader or phishing page. While no scripts were explicitly extracted, the PDF structure and lure suggest an attempt to trick users into downloading potentially malicious content.

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.co/app/431946152/unlimited-robux-hack-ios-game-hack PDF link annotation
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/rbx-roblox_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-free-shield_GM406889139.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/space-frontier-beta-release-hack-roblox_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/new-cheat-codes-for-adopt-me-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/code-roblox-free-items_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/cheat-bar-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/how-to-use-cheat-engine-on-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-robux-admin-panel-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning11.man1kotalubuklinggau.sch.id/__statics/gudangsoal/files/free-commands-for-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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
font_00_sfnt_off0000326b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x326B 22332 bytes
SHA-256: 3d91e9174dc2cdfb8798f6a0cc2a5ea3eb5866076d45bc5a2975f3d8dba9ef82
font_01_sfnt_off0000641e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 19452 bytes
SHA-256: ab52960f10ebcb068fa01f68a6bbd80f6c88c0615d0cf3c67a238e64b4254078

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