Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d306e4bd5302a6f…

MALICIOUS

PDF

48.9 KB Created: 2021-05-19 07:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 109200440f380084e091432fd671e476 SHA-1: 02bd9011465fb86057a162f9f4792a95d4720c4b SHA-256: 6d306e4bd5302a6f6dafb7e29c5a59f82b1f7eca44f0267918835bf3b92abf47
200 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' which redirects to a malicious URL. It also displays a fake CAPTCHA to trick the user into interacting with the document, likely to trigger further malicious actions. The ML classifier strongly indicated maliciousness, and the embedded URL is associated with known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/how-do-i-get-robux-game-hack In PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-roblox-groups-with-funds_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/cone-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/coin-master-free-2021_GM406889139.pdfIn PDF document text
    • https://eastwood.co.ke/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_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
stream_003_off00004d12.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D12 34720 bytes
SHA-256: d93c434d8f645038fb5e6493fada1983e29bcdcd770a0cc7fb59de37f7a826a7
font_01_sfnt_off00009d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D1F 18284 bytes
SHA-256: 76696481b4f85a4b134e50273d4f72d60bf885136cdb061a204ba21e520483fb

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