Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8a26d033e8544c…

MALICIOUS

PDF

35.6 KB Created: 2021-06-26 16:43:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 357cec667e585fa363cc161da49df0b6 SHA-1: d76f7034361fb4eaf90842db3f03ab11e936e0a0 SHA-256: 7a8a26d033e8544c955e7996afe63903f880bf14fe6d5dce19c847e8bf583eb2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs that are part of a link farm, likely intended to direct users to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' lure further supports this assessment. The document body, though heavily obfuscated, contains references to game hacks and exploits, reinforcing the phishing and potential malware delivery intent.

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/script-for-steve
    • http://artistaone.co/userfiles/files/coin-master-hack-app-download-free_GM406889139.pdf
    • http://artistaone.co/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://artistaone.co/userfiles/files/how-to-hack-jailbreak-roblox_GM431946152.pdf
    • http://artistaone.co/userfiles/files/free-coins-on-coin-master_GM406889139.pdf
    • http://artistaone.co/userfiles/files/coin-master-online-free-spin_GM406889139.pdf
    • http://artistaone.co/userfiles/files/free-spins-on-coin-master_GM406889139.pdf
    • http://artistaone.co/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://artistaone.co/userfiles/files/how-to-get-more-robux_GM431946152.pdf
    • http://artistaone.co/userfiles/files/free-shirt-templates-roblox_GM431946152.pdf
    • http://artistaone.co/userfiles/files/coin-master-online-hack-download_GM406889139.pdf
    • http://artistaone.co/userfiles/files/roblox-bloxburg-hack_GM431946152.pdf
    • http://artistaone.co/userfiles/files/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • http://artistaone.co/userfiles/files/how-can-you-get-free-robux_GM431946152.pdf
    • http://artistaone.co/userfiles/files/free-robux-just-enter-username_GM431946152.pdf
    • http://artistaone.co/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://artistaone.co/userfiles/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • http://artistaone.co/userfiles/files/free-robux-real-working_GM431946152.pdf
    • http://artistaone.co/userfiles/files/coin-master-hack-for-ios_GM406889139.pdf
    • http://artistaone.co/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdf
    • http://artistaone.co/userfiles/files/games-that-give-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003195.bin
838db4f8707dd1ca78d7f84ff8dbb280d3b84ea89bd11a15e11c4550eae6316b
pdf-font-stream PDF embedded font (sfnt) at offset 0x3195 22544 bytes
font_01_sfnt_off0000641e.bin
c6b19c363cfe4b0b3b466a4693ce236419963525d5cfda556e3499aba78671db
pdf-font-stream PDF embedded font (sfnt) at offset 0x641E 19748 bytes