Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee520d1a48b46799…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 04:38:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 93031f4ad416d955f96728481f253eb2 SHA-1: bf55838411a9a76d611836f14298e663e3f5e45c SHA-256: ee520d1a48b46799561197fe3575956cde0c6ecc98417ef3775b99db466a0e0c
102 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 appear to be part of a link farm promoting game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a lure to download further content. The primary goal seems to be directing users to potentially malicious download sites.

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/406889139/coin-master-free-blogspot-game-hack
    • http://www.romento.com/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-do-attack-speed-hack-roblox-2021-feb_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/coin-master-free-spins-link-quora_GM406889139.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/roblox-tps-soccer-cheat_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-scam_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/get-coin-master-cards-free_GM406889139.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/rblx-gg-free-robux_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/microsoft-bing-free-robux_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/sword-hack-script-roblox_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/coin-master-hack-apk-download_GM406889139.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/get-free-robux-generator_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/fros-digimon-v12-hack-roblox_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/free-coin-master-spin-generator_GM406889139.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/comment-avoir-un-cheat-sur-roblox-franais-gratuit_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/roblox-weight-champion-hack_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/robuxfree-con_GM431946152.pdf
    • http://www.romento.com/uploaded_files/userfiles/files/inf-jump-medefire-hack-script-for-phone-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000317e.bin
f4cd8133b011bb9aefc29c212eb206e675c80944380e37ed73aa1d9da90f5e0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x317E 23376 bytes
font_01_sfnt_off0000664f.bin
4ab065c9e1c1ce8cc0ca504291acf999189b22a872bad2ec3209c1b1ac2a7b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x664F 18464 bytes

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