Malicious PDF — malware analysis report

Static analysis result for SHA-256 46cb73a6a4f63446…

MALICIOUS

PDF

35.7 KB Created: 2021-07-09 05:20:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: edc7e2413484358b593cea269aee89f8 SHA-1: 51709b82bdb72cbf3b09fd8f36096fe02da8cd8c SHA-256: 46cb73a6a4f634462907c96d4c7a0e8f24d03b7059ec2d9133245ac41bb6ec8e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are SEO-optimized and related to game hacks and free currency for games like Coin Master and Roblox. The presence of a PDF_SEO_LINK_FARM heuristic and the ML_NYX_PDF_MALICIOUS flag strongly indicate malicious intent. The document body, though partially garbled, contains URLs that likely serve as lures for users seeking in-game advantages, potentially leading to credential theft or further malware delivery.

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.tw/app/431946152/claimrobux-net-game-hack
    • https://anshingtek.com.tw/image/data/files/moonactive-coin-master-free-spins_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/coin-master-hack-apk_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/websites-to-get-free-robux_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/coin-master-hacks-and-cheats_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/boku-no-roblox-quirk-hacks_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/roblox-how-to-get-free-robux-obby_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/how-to-hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/coin-master-free-chip_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/coin-master-free-box_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/coin-master-codes_GM406889139.pdf
    • https://anshingtek.com.tw/image/data/files/make-your-own-minecraft-server-free_GM479516143.pdf
    • https://anshingtek.com.tw/image/data/files/robux-website_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/is-the-roblox-app-free_GM431946152.pdf
    • https://anshingtek.com.tw/image/data/files/minecraft-pe-texture-packs-free-download_GM479516143.pdf
    • https://anshingtek.com.tw/image/data/files/free-likes-and-followers-on-tiktok_GM835599320.pdf
    • https://anshingtek.com.tw/image/data/files/free-girl-roblox-accounts_GM431946152.pdf
    • https://www.roblox.com/.I
    • https://www.roblox.com/my/tasks
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000334d.bin
63b6385782439099662ba74d91b7578b5e6255994a08a403e573d7a298589f71
pdf-font-stream PDF embedded font (sfnt) at offset 0x334D 22728 bytes
font_01_sfnt_off00006643.bin
8549144b6f18b2ccf0b55f2fedb85a0be6a8b8214e4cc832aceb3ddc8068c3b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6643 19108 bytes