Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ed50256a8d095e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 07:17:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0ba21ac405fb6721d44f5c782244ffa1 SHA-1: bccff7d9aa643a95aeabb1c12c3c498fe76da2b8 SHA-256: 53ed50256a8d095eb2f47c69a3253831fd93816c91d74f8930c50a5740810d9f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a high-risk lure for game hacks. The presence of a 'password-protected archive handoff' heuristic suggests the document is designed to trick users into downloading a password-protected file, likely to bypass security scanning. The overall pattern indicates a social engineering attempt to deliver a malicious payload or redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-group-roblox-game-hack PDF link annotation
    • http://library.forda-mof.org/katalog/repository/free-robux-account-generator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/20-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-hack-for-free-robux-without-veirfication-required_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-pet-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-free-robux-july-2021_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.forda-mof.org/katalog/repository/cm-free-spins_GM406889139.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_off000033b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33B7 22412 bytes
SHA-256: 9337a7e801ec02051206107e60af9a4113ed70025a2c2d0034586e57a15f71ab
font_01_sfnt_off000065a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A1 18968 bytes
SHA-256: 57604ea57d62e2aa634e965ec5800ebb3da15d6ae68f920e4611ad7eaaeb6114

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