Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0eacf8722b657d…

MALICIOUS

PDF

36.0 KB Created: 2021-06-19 09:22:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cc80026d2abaaf743ccc3c29749b1414 SHA-1: 6116aaeb984f7c172855868be6843d701225cb0d SHA-256: dd0eacf8722b657d471c58b66716010e6a3966f95b17c52b62c427bc660962c9
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as a link farm designed to attract search engine traffic. The document body and extracted URLs suggest a lure for users seeking game cheats or in-game currency, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious.

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/how-do-you-hack-roblox-for-robux-game-hack
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-com-free-avatar_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/robux-hack_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/legit-coin-master-hack-october-2021_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-do-u-hack-roblox_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-with-no-verification_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/hack-in-roblox-2021_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/do-coin-master-hacks-work_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/free-robux-com-2021_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/archery-master-3d-unlimited-coins-hack_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/google-play-coin-master-free-spins_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/changelog--free-codes-https-devforumrobloxcom-t-infinityrpgc_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-do-i-earn-robux_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/hacking-apps-for-roblox_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-avatar-editor-free_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • http://www.duchem.ae/uploaded_files/userfiles/files/how-to-hack-in-roblox-bee-swarm-simulator-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003382.bin
a034e942e80eb666600f8846b0ea4146020aabe9407886956ab62acce201c9e6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3382 22716 bytes
font_01_sfnt_off00006693.bin
90e078d7f267e28621c32393235d9f9d56115135a5e6c3332fcf88469c091056		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6693 19452 bytes

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