Malicious PDF — malware analysis report

Static analysis result for SHA-256 a622b36c850b94f9…

MALICIOUS

PDF

46.8 KB Created: 2021-06-11 06:25:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 81cd95151f0ead75c748a912103d983d SHA-1: c6d54ca55e632c766b41a09a7345594cb98065d5 SHA-256: a622b36c850b94f9ef5f39ab4cba774646081203b863ded84cf425c78cdf202b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack generator. The primary link redirects to a known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • 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.
  • 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.tw/app/431946152/roblox-hack-get-unlimited-robux-2021-game-hack In PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/free-roblox-shirt-templates_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-free-spin-app-iphone_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/tiktok-free-hearts-apk_GM835599320.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-hack-version-download-ios_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.markettraderacademy.com/uploaded_files/userfiles/files/roblox-hack-download_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_off0000568e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568E 25268 bytes
SHA-256: c61eb534def7cd8a79489eb2b0bb7f7b43934be27113cb7223ec3db89943b099
font_01_sfnt_off00009078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9078 19568 bytes
SHA-256: 3484b7bc1d8497112f978827a04265175388de54168173378ad0129d8db9a410

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