Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b5dcc08447b1e70…

MALICIOUS

PDF

45.2 KB Created: 2021-05-11 15:30:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 1766bf0f9a46e688f512d9c874c658f4 SHA-1: d48c22698ca23952422669fa4ca6f23c1acc2316 SHA-256: 6b5dcc08447b1e70b862047867ac46951699793bb96a423757db7a50e0fadd44
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document displays a fake CAPTCHA lure to entice users to click on embedded links, which is a common social engineering tactic. The presence of multiple URLs suggests a download or redirection attempt. While no scripts were explicitly extracted, the PDF structure and ML classifier indicate malicious intent, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-free-cards-game-hack PDF link annotation
    • http://rgadventure.com/userfiles/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/minecraft-kill-aura_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/rewards-robux_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-spins-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004910.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4910 24932 bytes
SHA-256: eef11686c87b8f66f219defe98fbfe045dfb0ba4e048754418f1c0cb967214a0
font_01_sfnt_off000081be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81BE 4020 bytes
SHA-256: dbaa9c12d07f3632734605f1d5d6dee3ad5af1f57488e46d95dab68b383f08c5
font_02_sfnt_off00008f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F46 17884 bytes
SHA-256: dce98ab1a9f6331dfaabbdd57dacdba92c66b57249d10e9c2a1df39138c2a47b

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