Malicious PDF — malware analysis report

Static analysis result for SHA-256 6491e409885e98ff…

MALICIOUS

PDF

45.7 KB Created: 2021-05-31 03:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4ff3d4142854562c102f902486df2b7d SHA-1: e1db9923162c95a94b841e06d4c516b1b7631edf SHA-256: 6491e409885e98ff67199434b325e5b776ef31e5b33b8bb5069c385307ca8568
182 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm. The document body and heuristics indicate lures for downloading free game items or software, such as Minecraft or Robux. The presence of a remote support tool lure and password archive lure suggests a multi-stage attack designed to bypass security controls and potentially gain remote access or deliver further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9580

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.xyz/app/479516143/how-to-download-minecraft-for-free-on-pc-game-hack
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/robux-hack-me_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-daily-free-spins_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-coins-coin-master_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-coin-master-app_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-alt-generator_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/daily-free-spins-for-coin-master_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/minecraft-free-play-no-download_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-generator-no-verification_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/coin-master-links-free-spins_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-script_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-redeem-codes_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-accounts-with-followers_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-computer_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-tiktok_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-minecraft-codes_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-coin-master-2021_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-today_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/give-me-free-robux_GM431946152.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-spins-coin-master-unlimited_GM406889139.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • https://hundt-druck.de/wp-content/uploads/fsqm-files/free-robux-without-doing-anything_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000054fb.bin
6b895e27cf8c5711bba61e5a10091f10579db356d1874006e7e5e5f379771010
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54FB 25752 bytes
font_01_sfnt_off00008f67.bin
9e3148d8479467241e454dad7f95496d0753043299a483a1afd63e9d4426fe5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F67 18444 bytes