Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2bc908511a8effb…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 00:26:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 45ede8a2969769b0479392b12a94c797 SHA-1: b9d7e0b6b8f83158836fe326fcb923d833cc05cf SHA-256: b2bc908511a8effbed54320361d683545e4191a054443a98cccd0f8aad096213
142 Risk Score

Malware Insights

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

This PDF document contains a large number of links, many of which are presented as download lures for game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'SE_PASSWORD_ARCHIVE_LURE' suggests that users might be prompted for a password to access downloaded content, a common tactic to bypass security scanners. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/coin-master-hack-dot-xyz-game-hack
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-promo-codes-robux-free_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/cb-ro-roblox-hack_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/get-coin-master-cards-free_GM406889139.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/the-roblox-free-bloxburg_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/pokemon-go-free-619_GM1094591345.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-xd-hacker-cheater-xd_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-hacks-for-coin-master_GM406889139.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/100-free-coin-master-spins_GM406889139.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-the-pizzeria-rp-remastered-give-all-coins-hack-2021_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/daily-coin-master-free-link_GM406889139.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/id-that-hack-roblox_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-hair-in-roblox_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/games-like-roblox-and-minecraft-but-free_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/annoying-orange-costume-free-on-roblox_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/dll-hacks-for-roblox-2021_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-verification_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/roblox-games-202120213-free-robux-roblox-game_GM431946152.pdf
    • http://jpschoolnewdelhi.com/uploaded_files/userfiles/files/the-rake-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec5.bin
ce106314e157c1d139f0090bbc9a91e6dfd5143d1224825f404300fe0012bd47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC5 23224 bytes
font_01_sfnt_off00006260.bin
c26c40ee4891c1d47adb0e8ebae699ddddaaac98e823d7b201e7cc814470c871		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6260 18660 bytes

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