Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b34edc1256e9986…

MALICIOUS

PDF

35.4 KB Created: 2021-06-25 07:32:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 00f6adb6dee3075493fb162538ac259a SHA-1: 167252685740d8f1139be143dd3ba541c1a3db73 SHA-256: 3b34edc1256e99865ef33e3b7d641f9d151739dc4c57b4c63b56d9eceb3ddde8
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.co/app/431946152/how-get-free-robux-hack-game-hack PDF link annotation
    • https://bwsrubber.com/image/data/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/robux-generator_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://bwsrubber.com/image/data/files/coin-master-free-spins-link-hack_GM406889139.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_off000032ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32BA 22536 bytes
SHA-256: 88c68be7b5a9b879c3c29aa0db8f7876bb1aa1a4e48234b1f05f7bb4643bc43a
font_01_sfnt_off000064d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D4 19152 bytes
SHA-256: 5e49f01aa693678dd6480f14166b40b4c5af79a6e6c5dde2fa197c47b81cd512

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