Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e74a833ef4de9be…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 19:16:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fafbb6ceb2c343d91a77ddc5005aaedb SHA-1: 6f618882886692279ff0cbb2af369f70d62266bc SHA-256: 7e74a833ef4de9be926d7cd12a522bdb6e3825dff4dbe609dce938f0bb6636ea
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to external websites, many of which are hosted on dunnagebags4u.com and appear to be part of a link farm designed to attract users searching for game hacks and cheats. The primary lure is for 'Coin Master Free Spins', directing users to a URL on netcdn.tw. The document's structure and content strongly suggest a phishing or malware distribution attempt disguised as a helpful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/406889139/coin-master-free-spins-facebook-game-hack PDF link annotation
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-noclip-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/how-to-hack-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/how-can-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/how-to-hack-roblox-account-script_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/youtube-roblox-jailbreak-hack-keycard_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/how-do-u-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/easy-points-gg_GM431946152.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/100-free-spins-for-coin-master_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
stream_002_off000030d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30D4 22576 bytes
SHA-256: ebe42465f5b932d932d8db3e032c0a2628db1f74e5d3a86125aba38a07d2b1c5
font_01_sfnt_off00006320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 18504 bytes
SHA-256: 60d2bdc76bcd03856ff56843c76a1045165bedbcd3c7078909a454fabf5c0968

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