Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fafb0dce63e042e…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 15:50:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 365b114a6edca25fd9044195cca61465 SHA-1: 8c75a2df9ed62d81643d9c759591c54bc8b37b9d SHA-256: 1fafb0dce63e042e7836e98caddd586c2445eda1c1d907645a3cf780a374fa3c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and text related to 'free Robux' and game hacks, directly linking to the URL http://netcdn.co/app/431946152/robuxreward-net-free-robux-game-hack. This URL is flagged as a redirector for game hacks, indicating a social engineering lure to drive users to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

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/robuxreward-net-free-robux-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-a-free-gamepass-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/wurst-download_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-2021-not-patched_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/gaming-cheats-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheat-noclip_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-form-jazz-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-how-to-get-free-obc_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_off00002f5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5D 22256 bytes
SHA-256: e8e9a0108fad80b035befe8e2bcd4d151c4d3c698fb6d74b058088a03b2d2816
font_01_sfnt_off000060cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CD 19156 bytes
SHA-256: c69bdab01ecf73e9b881863d52213aaa262a468cf9a96998833cd51492a93576

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