Malicious PDF — malware analysis report

Static analysis result for SHA-256 21c0e39a6d29f47e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 00:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fb4a7c4b88c1fc97cceb70769a2c5aa0 SHA-1: 80ecec1774a04c3bd1683c5aaca8b83e33a332d4 SHA-256: 21c0e39a6d29f47ec2f01d43e3c86537bd39a8677a136b4e4bb38b71ac87355c
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/406889139/how-to-hack-coin-master-pc-game-hack PDF link annotation
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-hack-com-no-human-verification_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/what-game-on-roblox-gives-you-robux-without-hacking_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-codes-june_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/gamescraft-org-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-robux-hack-code_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/pokemon-ultra-brick-bronze-roblox-free-shiny-eevee_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/descargar-roblox-hackeado-con-robux-infinitos-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.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
stream_002_off00003033.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3033 23100 bytes
SHA-256: 043f1bb06b303f201697e157b3c012928f802c13341ce4e0cf5ecb5a8f3234e4
font_01_sfnt_off00006411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6411 18320 bytes
SHA-256: 7b38b525648f52fd16d6e0e97132289892bc4925aa7b4ec9b918ecc376b61b1e

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