Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4de00af43889f92…

MALICIOUS

PDF

33.1 KB Created: 2021-07-02 04:35:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9cb58577d393d33697d2509bcd1cfcd8 SHA-1: ae8c9bf0da6baee4af49fb2b52cf5420ab7d1ad3 SHA-256: f4de00af43889f9292655ec39b01b19528968f9be37168b40fae1eb5b0f37ce6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external sites, many of which are hosted on '3qblocks.com.tw' and appear to be related to game cheats and free virtual currency. The presence of a direct download URL and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest this document is designed to redirect users to malicious or scam websites. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/free-robux-site-2021-game-hack PDF link annotation
    • https://3qblocks.com.tw/image/data/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/daily-reward-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-x-club-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/pastebin-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-money-in-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-1x1x1x1-hack-crazy_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-roblox-accounts-with-cookie-venom_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/car-sim-free-car-roblox_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-tiktok-followers-without-survey_GM835599320.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-in-pc_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C52 21424 bytes
SHA-256: f77bc71e1483c342bbc44f4719f986021d9014786a5f1d1ffe6a543ecf32d57f
font_01_sfnt_off00005b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0C 19340 bytes
SHA-256: a75b1bc97583e6f05a194114b5d5223d19ff076717d3a39f7ba8b2a60485ef56

Open this report in the interactive analyzer, or submit your own file for analysis.