Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dac6764d1844c18…

MALICIOUS

PDF

35.6 KB Created: 2021-06-30 01:21:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1aa2515eac7761e2a956395a50ac3494 SHA-1: a41797ea3af034018cb53ebdf5d2bbac3dffaa46 SHA-256: 8dac6764d1844c185782659f5b3b836a348290924673ddb10c5c5fa90ae47464
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways for game-related cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a download button lure further supports a malicious intent to redirect users to potentially harmful content. The document's primary function appears to be a link farm designed to attract users searching for game exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/free-robux-while-in-game-game-hack
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/easy-way-to-get-free-robux_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-a-face-on-roblox-for-free_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/legendary-football-roblox-hacks_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-my-hero-academia-online-hacks_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-meep-city-how-to-get-free-coins_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-get-free-hair-on-roblox-2021_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-glitch_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/roblox-adopt-me-free-pets_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/rbx-roblox-robux_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-no-apps_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/forum-cheat-roblox_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/free-robux-generator_GM431946152.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/minecraft-jar-free_GM479516143.pdf
    • http://www.qandqsafety.com/uploaded_files/userfiles/files/how-to-hack-roblox-wikihow_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032fc.bin
5d14b154a937a62d2bf54a85fa993d7dcb74814a4d7f46a2dae3be6ef94ce0d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32FC 22436 bytes
font_01_sfnt_off00006516.bin
75d0e7e54530287a7b4fc5b353ebfbe217f85614068bf8ea23e763f108809d5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6516 19532 bytes

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