Malicious PDF — malware analysis report

Static analysis result for SHA-256 490328162436160a…

MALICIOUS

PDF

42.3 KB Created: 2021-05-17 03:33:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 59d3b023e6ae5956a92929a69fa47cfd SHA-1: 6ae374141f871a3afe9575ca4e2ae2fff7f1ab24 SHA-256: 490328162436160a915760d7ecf9a3803e59f1f710af906bdabce72d94c28da0
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are related to game hacks and cheats, suggesting a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download' button lure further supports the malicious intent.

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/431946152/how-do-you-get-roblox-money-game-hack
    • https://www.tiancom.com.tw/upload/files/how-can-u-get-free-robux_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/hack-minecraft_GM479516143.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/get-free-spins-coin-master-2021_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/claimrobux-net_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-2021-free-spins-link-blogspot_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/free-robux-codes-2021_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-version-download-ios_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/robux-com-free_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/robux-generator-no-verification-needed_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-download-android_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/how-to-make-a-roblox-group-for-free_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/play-coin-master-online-free_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-hack-mod-apk-35-8_GM406889139.pdf
    • https://www.tiancom.com.tw/upload/files/free-robux-link_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • https://www.tiancom.com.tw/upload/files/coin-master-codes_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b8.bin
43ecf821127f39174d8b5b04057f9828bb6bc8e2d31d52dc12c969e23ed2dc49
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B8 25160 bytes
font_01_sfnt_off000080d0.bin
29cfb48d0033888f81e151c2829fb396172311d25236ba798d4831208641a69e
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D0 18896 bytes