Malicious PDF — malware analysis report

Static analysis result for SHA-256 329dd84aa65ba115…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 05:54:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 53de92223db45efa94ee434390d32e42 SHA-1: b6210ccf039a045123cd5b25ae223c92d35988c7 SHA-256: 329dd84aa65ba11527ad0e50111f0bd453d49a25a48334dfaf67f127a263ae12
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, identified as a link farm, likely intended to direct users to download applications or access other content. The heuristic 'PDF_SEO_LINK_FARM' and the presence of multiple URLs related to game hacks and cheats strongly suggest a malicious intent to distribute potentially unwanted or harmful software. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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.online/app/406889139/coin-master-mod-apk-2021-game-hack
    • https://domc.tw/upload/files/free-robux-no-gift-card_GM431946152.pdf
    • https://domc.tw/upload/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://domc.tw/upload/files/coin-master-golden-cards-hack_GM406889139.pdf
    • https://domc.tw/upload/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://domc.tw/upload/files/how-to-get-free-robux-for-free_GM431946152.pdf
    • https://domc.tw/upload/files/minecraft-cracked-client_GM479516143.pdf
    • https://domc.tw/upload/files/roblox-com-games-referrer-roblox-player_GM431946152.pdf
    • https://domc.tw/upload/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://domc.tw/upload/files/robux-hack-me_GM431946152.pdf
    • https://domc.tw/upload/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • https://domc.tw/upload/files/coin-master-extra-spins_GM406889139.pdf
    • https://domc.tw/upload/files/hacked-roblox-game_GM431946152.pdf
    • https://domc.tw/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://domc.tw/upload/files/tiktok-free-like_GM835599320.pdf
    • https://domc.tw/upload/files/tiktok-famous-club-free-followers_GM835599320.pdf
    • https://domc.tw/upload/files/minecraft-free_GM479516143.pdf
    • https://domc.tw/upload/files/coin-master-cards-free_GM406889139.pdf
    • https://domc.tw/upload/files/coin-master-hacks-for-iphone_GM406889139.pdf
    • https://domc.tw/upload/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdf
    • https://domc.tw/upload/files/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_004_off00004d7d.bin
23da8c37ee1cd988302db4a7facafc630ae58ab28411d77c4bfae37106e2ce93
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D7D 24624 bytes
font_01_sfnt_off00008436.bin
3a864882e9e4289fde3385ccd09838686b667c82d90ee6c78e630994fecff89f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8436 18468 bytes