Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b3500ee48b0d10a…

MALICIOUS

PDF

35.4 KB Created: 2021-07-08 00:51:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b76cea1ce43d5500a4e800c2f772784c SHA-1: 5c85792125db08233890d8680855e59bc7e75e48 SHA-256: 1b3500ee48b0d10a3a1b68d6f3943f4abd5d786facd671f43513655b8faa35d1
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to attract users searching for game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URIs and a 'download button' heuristic further supports a malicious intent to redirect users to potentially harmful content.

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-spin-appscoin-master-game-hack
    • http://rollipolli.hu/userfiles/files/how-to-ban-a-hacker-on-roblox_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/roblox-cheat-money-in-jailbreak_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/roblox-game-for-free-online-in-toysrus_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins-android_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/minecraft-ps3-free-download_GM479516143.pdf
    • http://rollipolli.hu/userfiles/files/como-hacker-el-server-de-naruto-final-bond-roblox_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/how-to-hack-roblox-flood-escape-2-no-downloads_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/did-roblox-get-hacked_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/roblox-sexually-abused_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/free-robux-no-human-verification-2021-mobile_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-hack-using-cheat-engine_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-2021-working-unpatched-free-robux_GM431946152.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-free-coins-link_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/coin-master-free_GM406889139.pdf
    • http://rollipolli.hu/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000333e.bin
dba45220bd096f9e70c709207fb3353b806e9362d710b2798d7b58545cac49d0
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333E 23436 bytes
font_01_sfnt_off00006839.bin
f98b14fa014d7e4f340675e0a40dd89d5d834238fa4c598c163f2051dae61cd0
pdf-font-stream PDF embedded font (sfnt) at offset 0x6839 18176 bytes