Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c79cc9dc56ae2f5…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 08:39:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a16c9ff07111a2aa0b79342b59620889 SHA-1: 6c28fbd0c376dd6b025b5908aa832e0f137f548e SHA-256: 5c79cc9dc56ae2f537b79aa4f748df634490a91714f9c8f7dc4d7d0c29c84b65
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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-ftw-game-hack PDF link annotation
    • https://learnwmf.org/image/data/files/hot-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-download-hack_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/get-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-how-to-hack-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/robux-hack-script_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-2-get-free-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-robux-2021-today_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-get-free-robux-chrome-console_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/how-to-buy-pubg-uc-for-free_GM1330123889.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://learnwmf.org/image/data/files/free-robux-for-samsung-s3_GM431946152.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_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22612 bytes
SHA-256: 000e377d2932604af57e4f4913d4af350695cd6fe0291ccf97ff5cc5d26fbc83
font_01_sfnt_off000060ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 18920 bytes
SHA-256: 96aab3e1bdf0996c2ce9c94c5964c7b67b65f56bcfec0bc134d915fc8fe5bf27

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