Malicious PDF — malware analysis report

Static analysis result for SHA-256 970dc74ea50a5e77…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 15:04:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 12c535e661be7ddd47ce332113bbee5a SHA-1: 6a15001f79f3469db04461ae9be8432f6ab11b84 SHA-256: 970dc74ea50a5e778b12bd04eb38e702dd2d3a1c09d66e841279fbc383c35ecf
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF files related to game hacks and cheats. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body, though partially corrupted, contains a URL pointing to a 'coin-master-mod-version-free-download-ios-game-hack'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-mod-version-free-download-ios-game-hack
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-claim-free-spins_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/is-roblox-studio-free_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/how-to-hack-in-arsenal_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/earn-free-robux-on-roblox_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/roblox-robux-codes-2021_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-heaven-free-spins-today_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-mod-apk_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/google-how-do-you-get-free-robux_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-free-coins-and-spins-2021_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/minecraft-hacked-client-112-2_GM479516143.pdf
    • https://www.tiancom.com.tw/upload/files/roblox-free-robux_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/blox-rewards_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/free-gifts-coin-master_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-games_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-reward-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ac8.bin
c1d206413d54c6e5499ca2d517fc742fd6d2384e9ae22f933908aa1134cb1484
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AC8 24368 bytes
font_01_sfnt_off00008294.bin
e21c1a46e414e08f32ecd5b141a565b40ef5ebf0a551a42677bec20a6ad54cab
pdf-font-stream PDF embedded font (sfnt) at offset 0x8294 18424 bytes