Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb9fc48daff4be6…

MALICIOUS

PDF

49.3 KB Created: 2021-06-09 01:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 32e89de93caaa0ffe757372010b55e68 SHA-1: 287f0bb55432e8b6807338053dc8d009c9a21422 SHA-256: 5cb9fc48daff4be6431cab4a69e7c00a0cde5635af8facc193f00c59f292d3a8
102 Risk Score

Malware Insights

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

This PDF document was identified as malicious by an ML classifier and contains a large number of external links, many of which point to other PDFs related to game hacks and cheats. The document body, though heavily obfuscated, contains references to 'Roblox Promocode Hack 2021' and a URL that likely serves as a lure for users seeking such cheats. The presence of a link farm and the deceptive content strongly suggest an attempt to drive users to malicious downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/pastebin-roblox-promocode-hack-2021-game-hack
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/brick-cars-roblox-cheat-codes_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/secret-free-robux_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-free-printables-party_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-one-piece-millennium-stats-hack-script_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-cheat-roblox-tycoons_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-scam-no-survey_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/bleu-roblox-mega-free_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-a-computer_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-the-roblox-sex-hack_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/coin-master-free-spins-daily_GM406889139.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-wanted-hack-pastebin_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-suits-from-catalog-roblox_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-generator-2021-hack-no-survey_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-tix_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-hats-roblox-2021_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-robux-generator-2021-no-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052e8.bin
cbe9c9f23beaa087a5677c92f305280647560f1a0655469e43e3c16330133bbc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52E8 25364 bytes
font_01_sfnt_off00008d8e.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8E 5696 bytes
font_02_sfnt_off00009aa0.bin
d14fd409861c8c67d50da1dfc5ac282096de0a7b69f897464f2002fe893cd849		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA0 19396 bytes

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