Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad52861723811bae…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 09:35:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 75d26b71d4eb398463936f6618c60a49 SHA-1: 778ce05b7c63f582e94337ce4ec0508a17abb3d0 SHA-256: ad52861723811baeb530828bfed6b809f488aea0b4943385a638421b53172dd2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and generators, specifically mentioning 'Roblox Piano Hack'. It contains multiple embedded URLs, with the primary one being http://netcdn.tw/app/431946152/roblox-piano-hack-game-hack. The document's structure and embedded links suggest it is designed to redirect users to potentially malicious websites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF's nature and embedded links strongly indicate a phishing or social engineering attack.

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/roblox-piano-hack-game-hack PDF link annotation
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/nike-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/earn-free-robux-site_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/hack-for-roblox-bee-swan_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-amby-hack_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-studio-hack-message_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-parking-in-back-id-roblox_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/cheat-codes-roblox-rocitizens_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-generator-no-survey-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/coin-master-hack-no-verify_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/roblox-hacks-jailbreak-noclip_GM431946152.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://zustsearch.com/uploaded_files/userfiles/files/robux-for-offers_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_off000031d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D5 22836 bytes
SHA-256: f8a2e8a50268b40d9964ac51915eb1219f0efdbdc027b3c5734db5e72f016270
font_01_sfnt_off000064ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FF 18932 bytes
SHA-256: bea12f5c1905fe5d1ca5acd369b45985eddae9fbbbe34fc32947a46404ebe472

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