Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3fafcbc442f17c…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 05:06:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 40ce89f7e82be84181fd8d6c8cf63993 SHA-1: d717cf519453d01ffc0a0e52fa4e5d7f2e74b4cb SHA-256: 5d3fafcbc442f17c034d11238641aef210e980ddcb70ccaa60b29b96797fa221
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/406889139/coin-master-free-spin-reward-links-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/diary-of-a-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-slaying-simulator-level-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verifacation-or-scam-mobile_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cheat-engine-fighters-beta-how-to-level-up-fast-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-security-vest-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/dantdm-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/best-free-robux-obby_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-free-download-for-ps4_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-game-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-free-robux-here_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-hax-download-no-virus_GM479516143.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
stream_002_off00003274.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3274 22588 bytes
SHA-256: 8a0fb383d2e4fe3eeef66cc5f2074ab9a577265611f2697ad77a5cb8a78a36da
font_01_sfnt_off000064cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CF 18680 bytes
SHA-256: 1f410b421e14c3c9fbf7e9bbfeefe584f4a56fc2fc275a58efc280a6e8be8f92

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