Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50455e082442b5d…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 17:36:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 12bffcb14d452a82e6b0ec3d967d243a SHA-1: 11e3e043696811f34a1e1143bdbe8bff19af9a3f SHA-256: b50455e082442b5d4d4e1ae85f9741c61af48dbef93fa785dc7ea72619cf4f0e
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-to-get-free-pets-in-adopt-me-roblox-game-hack PDF link annotation
    • https://www.transvision.id/ckfinder/userfiles/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-on-facebook_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/best-hacked-client_GM479516143.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/pokemon-go-free-98_GM1094591345.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.transvision.id/ckfinder/userfiles/files/free-robux-with-no-verification_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_off00002fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDE 21576 bytes
SHA-256: 41a803d82d3dff93ca7929443323513ecfe5fb5e044af4c92aaa5ce0c545fedd
font_01_sfnt_off00005f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F5D 19620 bytes
SHA-256: bc53b7e0a3d994d1aea6b32a21162b349148a09686b1a296b70cb8e1a20cc1e0

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