Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c6ed418c7a2715…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 01:40:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f441648efb2ba963d755225d0778c807 SHA-1: af76bae4a235e7703514a9de9098f8b9d6738da4 SHA-256: 61c6ed418c7a2715c4d350a29d95f0bee5eb1b5b72b7d1d925400f06937cdd08
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for free game hacks, specifically mentioning Minecraft and Robux, which is a common social engineering tactic. The embedded URL, http://netcdn.tw/app/479516143/minecraft-world-free-download-game-hack, is flagged as a redirector to a malicious download site. The ML classifier also strongly indicates maliciousness. No scripts were extracted, but the PDF structure and embedded URI strongly suggest a phishing or malware distribution attempt.

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/479516143/minecraft-world-free-download-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-obc-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-accounts-2021-real_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-change-roblox-name-for-free-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-websites-not-clickbait_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-legal_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/download-hack-roblox-cb-ro_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-free-redeem_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-how-to-hack-accounts-no-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacker-mask-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-hacker-com-free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-money-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/f3x-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/new-roblox-logo-gives-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-links-for-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-scams_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_off00003016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3016 22372 bytes
SHA-256: 8c8814e4e4942354c0a51040537760f7045c8941266ecafa4904380cffd4d03e
font_01_sfnt_off00006135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6135 18776 bytes
SHA-256: 481cbd98ab74bd1c91b8de4447db594688d400b579bbec245cf53aeb55c0cf07

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