Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc04bc987fc6fb4e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-04 03:29:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 20cc547cd13327ebd66ba72c7e7512a8 SHA-1: 4f9e39703c42e1c6eeb54f9b3b91b4af0329dda5 SHA-256: cc04bc987fc6fb4e75cdc73253bbeaf471edfb5149389e4e8311b25091ad5060
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/how-to-change-roblox-username-for-free-2021-game-hack PDF link annotation
    • https://bwsrubber.com/image/data/files/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-ad_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-synapse-cheat-script_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-hack-a-roblox-account-that-had-no-email_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-roblox-sigh-in_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-hack-weight-lifting-sim-in-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/adopte-me-hack-project-alpha-300-roblox_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-reddit_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/tiktok-free-likes-no-survey_GM835599320.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-with-no-survey_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_off00002eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB8 22168 bytes
SHA-256: daf73c64d30d7d69b52b23a2bb032cf23e111031a1a9eebce0c910b9420e3d9b
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 19644 bytes
SHA-256: 4b774c189f9136f23661d737726efe76a6ad5d4a04d9a85acf723e4c99e8a07e

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