Malicious PDF — malware analysis report

Static analysis result for SHA-256 6632f86227cd4352…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 10:40:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8723dae29cecfaa4f8d56ce6eb1494da SHA-1: b458e9f2ab715ab8184f80cc9bda0adad2a1f18f SHA-256: 6632f86227cd4352a1e95ff0e1d9e0f6eca3ddf7e770cfcd3d32cb1c0fd11ce1
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/479516143/wurst-download-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/free-roblox-code-items-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/jjsploit-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheats-to-steal-a-keycard-in-roblox-rocketfule-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-server-shutdown-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-jalbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-rc7-apocalypse-rising-hack-scripts_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-do-u-get-free-robux-on-roblox-2021_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_off00003050.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3050 22888 bytes
SHA-256: 7ecd6101649bda130c04e03abfa74548cdef537856723713c502f8498d454368
font_01_sfnt_off0000631a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x631A 18796 bytes
SHA-256: 41b057bebeefa6dc0e0c7cd8e7e537373d3987302916cf05e2be674a8495b48b

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