Malicious PDF — malware analysis report

Static analysis result for SHA-256 11490f45db1be35b…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 02:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0e9985b6f337a842a1d30d94617be448 SHA-1: 7b625e52de1c74a6fc516cb959c4c70f4d5f5059 SHA-256: 11490f45db1be35b78ea0d3b6d37820fc5dd89df281b83fe001d7dfd3c628d14
122 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which are hosted on IP addresses and point to files related to game cheats and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.tw/app/431946152/hack-para-dragon-ball-z-rage-roblox-game-hack
    • http://183.91.70.11/repository/free-robux-com-no-verification_GM431946152.pdf
    • http://183.91.70.11/repository/pokemon-go-free-remote-raid-pass-february-2021_GM1094591345.pdf
    • http://183.91.70.11/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdf
    • http://183.91.70.11/repository/how-to-make-your-own-roblox-dll-hack-client_GM431946152.pdf
    • http://183.91.70.11/repository/how-to-hack-coin-master-2021_GM406889139.pdf
    • http://183.91.70.11/repository/is-minecraft-free-on-ps4_GM479516143.pdf
    • http://183.91.70.11/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://183.91.70.11/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://183.91.70.11/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • http://183.91.70.11/repository/coin-master-spins-hack-2021_GM406889139.pdf
    • http://183.91.70.11/repository/roblox-hack-ios_GM431946152.pdf
    • http://183.91.70.11/repository/100-free-robux-no-human-verification_GM431946152.pdf
    • http://183.91.70.11/repository/free-robux-pin-codes_GM431946152.pdf
    • http://183.91.70.11/repository/minecraft-story-mode-free_GM479516143.pdf
    • http://183.91.70.11/repository/free-robux-thru-discord_GM431946152.pdf
    • http://183.91.70.11/repository/free-robux-co_GM431946152.pdf
    • http://183.91.70.11/repository/free-robux-accounts_GM431946152.pdf
    • http://183.91.70.11/repository/roblox-how-to-get-free-bc-with-cheat-engine_GM431946152.pdf
    • http://183.91.70.11/repository/how-to-hack-roblox-2021_GM431946152.pdf
    • http://183.91.70.11/repository/coin-master-cheat-apk-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051aa.bin
4ea7711d54033df3868515ec831bd113bbb116acff5ed497dfcd0d2925b964c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x51AA 25160 bytes
font_01_sfnt_off00008c2e.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2E 3884 bytes
font_02_sfnt_off000098d6.bin
7d81cb3034a5e39f86360f615e074aaabf0142e9b1cf814f380a2310495d00c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x98D6 18888 bytes