Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d12b97897c05f3…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 06:31:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 936de8384e6bc69809d14d8d69b70127 SHA-1: 6abc1aa046c023ed0a938f02f024d23e08091fed SHA-256: 14d12b97897c05f34a7a3743e83bed041a896dd36e7c38cab01740e4ce1aa639
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to 'netcdn.tw', that promise free in-game currency and hacks for popular games like Coin Master and Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of these links and the deceptive content indicate an attempt to redirect users to potentially malicious sites for phishing or malware distribution.

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.tw/app/406889139/free-coin-master-spins-link-game-hack
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/game-hacked-decal-roblox_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-spin-coin-master-twitter_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/how-to-damage-hack-on-roblox-mad-paintball_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-robux-and-tix-generator-no-offers_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-robux-easy_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/robux-game_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-cheat-engine-hack_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-robux-script_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-noob-shirt-roblox_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/roblox-robux-hacks-com-online_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/robux-generator-without-human-verification_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/free-robux-real_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-hack-2021_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/roblox-elemental-battlegrounds-element-hack_GM431946152.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdf
    • https://www.dunnagebags4u.com/uploaded_files/userfiles/files/counter-blox-roblox-offensive-hack-money_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003419.bin
883ae0eefbb198af886c093eed80f676d33f3a78e0a5d7e305cc8e47f0e2785e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3419 23484 bytes
font_01_sfnt_off0000693f.bin
e5708adc55f341f1815264f824e66db99aea16b99fe97f5a0313ff5db2d8cb38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693F 18344 bytes

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