Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05b01b3fab49b7d…

MALICIOUS

PDF

36.9 KB Created: 2021-06-18 05:52:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1721e20812b4ab1608d74d53bd6a973 SHA-1: b056854650f689b0fc76570f966315cdcb2074d7 SHA-256: c05b01b3fab49b7de2c7f41fa2d10e8fdc218668eb0495cd291813a749b2f372
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that explicitly advertises 'free Robux' and game hacks, acting as a lure. The primary URL, http://netcdn.co/app/431946152/how-to-get-free-robux-no-downloading-or-inspecting-game-hack, is directly linked to a game hack redirector heuristic. This suggests the document's purpose is to drive users to potentially malicious websites, likely for phishing or malware distribution.

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-robux-no-downloading-or-inspecting-game-hack PDF link annotation
    • https://www.cgalgeria-dubai.com/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-fans-on-tiktok_GM835599320.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-spin-and-coin-blogspot-com_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-granny-cheats_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/minecraft-pe-hacks_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
font_00_sfnt_off000035c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35C1 23040 bytes
SHA-256: e98b3f3ed230917dadc71bec8b1cc7afb791953bd740fb95608dc60af4726f73
font_01_sfnt_off00006941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6941 19696 bytes
SHA-256: e2f25a7ea37910966918351e2d166a20e23ce01da2b2ee50224f01d2178eae66

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