Malicious PDF — malware analysis report

Static analysis result for SHA-256 368bee2299451390…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 14:30:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e9b007c1d7c140fb3a5b23e1de628a5d SHA-1: 4bafa7170cb8adf19464b39edd87b8613be41f07 SHA-256: 368bee22994513904aabd22ea45e2f53d923dd46a6b042f74c4762c47fa0d607
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-roblox-codes-october-2021-game-hack. The document body and embedded links are designed to lure users into clicking these links by promising free game currency or hacks. The presence of multiple redirector links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-codes-october-2021-game-hack In PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/pubg-50-uc_GM1330123889.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-hacks-that-actually-work_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-hack-in-booga-booga-roblox_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/spin-link_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/hacking-sites-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-level-3_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/youtube-denis-daily-free-robux_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/earn-free-robux-by-completing-offers_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.skygan.com/uploaded_files/userfiles/files/coin-master-root-hack_GM406889139.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_off00002ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EE6 22160 bytes
SHA-256: 9ccd749ceaa712d7e91f5924ff0d131b72ed33a147d14459ba93072d23616145
font_01_sfnt_off00006001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6001 19328 bytes
SHA-256: 9392a13fdfca234d4026215f93dab879a75c2956a1aa80793139b1d06fdc949e

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