Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8b4bad06403de5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-06 07:53:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9aef7320de2450a3fae1af63e6b019a0 SHA-1: fb9b9b53a86cddbfb9312501f01d987a57c29183 SHA-256: 1d8b4bad06403de58b25a4b6045e09fdd31ecc105ac46d05501c2b685caebea5
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/robux-generator-2021-game-hack PDF link annotation
    • https://lib.unitri.ac.id/repository/hacks-in-mining-sim-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/como-hackear-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-bloxburg-house-builders-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-royal-high-free-diamonds_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-launcher-free-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-in-1-minute-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-cards-me-com_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-free-clothes-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-android-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-do-i-get-free-robux-easy_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_off00003179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3179 22556 bytes
SHA-256: 983e34e1ab204ea6cfb1638827d09ba518468f0953e64abb5f7326fba2efb935
font_01_sfnt_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 19056 bytes
SHA-256: 7fa28bf5c82c36580802a0e9e8c596db7b5f5881ccdac0bf93c9c6654f53e8d2

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