Malicious PDF — malware analysis report

Static analysis result for SHA-256 4015e7df5b541d8e…

MALICIOUS

PDF

45.8 KB Created: 2021-06-08 16:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6de66c777578811e15f5a7879e7b63ba SHA-1: 96d46b21c23dbf3eb37938453ec39f73dc6a3236 SHA-256: 4015e7df5b541d8ea2eb9b815320afa0ec9ad65011ea854d510dc2b8f0a91b8c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA lure, which is a common tactic to trick users into clicking malicious links. The embedded URL and numerous other URLs point to sites offering game cheats and hacks, suggesting a lure for potentially unwanted or malicious software. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-cheats-for-robux-android-game-hack
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-1-million-robux_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/infinite-robux-hack-2021-sc_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-get-free-robux-for-real_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/broken-bones-4-hack-roblox_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-gamepass-script-roblox-pain-exisgt_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-v3rmillio_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-hack-fly-download_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-elemental-wars-hack_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/free-minecraft-skin-maker_GM479516143.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-network-free-robux_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-how-send-report-to-hacker_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/roblox-april-fools-hack-2021_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/best-app-to-get-free-robux_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-too-hack-in-superhero-simulator-roblox_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/2021-roblox-hack_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/how-to-cheat-roblox-tycoons_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/release-boku-no-roblox-remastered-free-lvl_GM431946152.pdf
    • https://taxandmore.nl/wp-content/uploads/fsqm-files/win-2021-free-robux_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/free-robux-promo-codes-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000551c.bin
9f2be8e18cdbf15f9240123e846ca1543820d6390055c33a94f7174a3cb5765b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x551C 25008 bytes
font_01_sfnt_off00008ea2.bin
736aca9726a076828023deb6741904c25a75f54d5e5c7a4d163b24442c51b6a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EA2 18880 bytes