Malicious PDF — malware analysis report

Static analysis result for SHA-256 71cbedee35abf828…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 15:33:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dd3abfd97f7835c3728418920286798e SHA-1: da7933c183262ab55358e9f916678d3630334314 SHA-256: 71cbedee35abf828b4a6b500d1211aa77a8746113fd129a469ca1c00bff4dbaa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to entice users to click on a malicious link. The primary link directs to a URL promising a 'coin master hack app', which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit vulnerabilities or redirect users to a malicious site for further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-hack-app-ios-download-game-hack PDF link annotation
    • http://library.fk.upnvj.ac.id/repository/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-svg_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_003_off00004b02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B02 24744 bytes
SHA-256: 5513cd3ab444d802fd2cc9dd46b7c916708b9ac594538f5e4ab3cbf848112d11
font_01_sfnt_off000082fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82FE 18472 bytes
SHA-256: 0c4cab68c529531eb2b4d04ec138a4fc88ce066c8f2d87c6dc4b9eb8bdd1696f

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