Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab2d02099e3a12a…

MALICIOUS

PDF

47.4 KB Created: 2021-05-14 14:35:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 157ff1bbd74c960935a75bbc3db5bbc1 SHA-1: c4a4e33db0cb33b8279cd5cd2a626118e8178148 SHA-256: 8ab2d02099e3a12a972504d750a57308e6bcce1841556746eda7df7514f74306
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which point to websites offering game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with promises of in-game advantages. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://netcdn.xyz/app/431946152/roblox-printables-free-game-hack
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-daily-spin-link-app_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-booga-booga-hack_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-free-printables_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/good-free-minecraft-server-hosting_GM479516143.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/minecraft-windows-10-edition-free-with-java_GM479516143.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-hacks-no-human-verification_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-for-iphone_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-moonactive_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-site_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdf
    • http://uas.com.my/uploaded_files/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c56.bin
8927d80c54d7e14d0b5db13957217e8fef55ac32b013526c1a2bcdce8a4d8bc5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C56 33604 bytes
font_01_sfnt_off00009683.bin
b5ee65cd5901ad7693dfafde0b4a4a2e01b57e67b0b7341f09a29d5f18e40ca4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9683 18552 bytes

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