Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a76297d09afe226…

MALICIOUS

PDF

35.8 KB Created: 2021-06-19 04:13:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 473db1cab80cd2b95d6ffd49685ba08a SHA-1: 6ad26ee2636b322a2372fd6de86b559e70a6a466 SHA-256: 6a76297d09afe226004f1f4847f633b5a0975ff3722610b3c3426ee288c2fc17
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 disguised as legitimate repositories for game-related hacks and free items. The presence of a 'PDF_SEO_LINK_FARM' heuristic firing indicates a large number of these links were generated programmatically to appear as legitimate content. The ML classifier also flagged this PDF as malicious with high confidence, suggesting it is designed to trick users into downloading or visiting malicious resources.

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.co/app/479516143/minecraft-java-edition-redeem-code-free-2021-game-hack
    • https://lib.btkljogja.or.id/repository/free-tiktok-followers-and-likes_GM835599320.pdf
    • https://lib.btkljogja.or.id/repository/play-minecraft-for-free_GM479516143.pdf
    • https://lib.btkljogja.or.id/repository/xbox-hack-to-play-roblox_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/how-to-bypass-roblox-anti-cheat-engine_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/minecraft-beta-free_GM479516143.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-hacksco_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/roblox-g_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/how-to-hack-bedwars-2-on-roblox_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/coin-master-free-coins-2021_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/roblox-health-hack-2021_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/how-to-hack-coin-master_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/hack-coin-master-android-game_GM406889139.pdf
    • https://lib.btkljogja.or.id/repository/i-got-hacked-on-roblox_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/free-roblox-sparkle-time-shirt_GM431946152.pdf
    • https://lib.btkljogja.or.id/repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000338f.bin
37b50bbdf08aaa1fb1e72eb9bcc51b4361de619dd3c8b4fbe3a4cef63df3a297
pdf-font-stream PDF embedded font (sfnt) at offset 0x338F 23032 bytes
font_01_sfnt_off000066d1.bin
a2b86775a090322cefa709cc1fcca9712d09ee5c8c945508c2446f9382ffb316
pdf-font-stream PDF embedded font (sfnt) at offset 0x66D1 19116 bytes