Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b41b1f71129f7c4…

MALICIOUS

PDF

41.5 KB Created: 2021-05-13 19:40:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4655ec0cf1acf98d24e04a9df1dd277c SHA-1: a3373efa64fb111557c34eabff9643a6a53ffbf1 SHA-256: 2b41b1f71129f7c492a13f4d0289037620da4efdafac01f8ef3953a02372bd12
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 point to SEO-manipulated PDF files related to game hacks. The primary external URL, https://netcdn.xyz/app/406889139/coin-master-hack-ios-no-human-verification-game-hack, suggests a lure for a game exploit. The heuristic firings indicate a PDF link farm and a high ML classification score, supporting the malicious verdict.

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-hack-ios-no-human-verification-game-hack
    • http://gamixpaliwa.pl/images/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://gamixpaliwa.pl/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://gamixpaliwa.pl/images/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdf
    • http://gamixpaliwa.pl/images/download-hacked-games-com-coin-master_GM406889139.pdf
    • http://gamixpaliwa.pl/images/can-you-hack-coin-master_GM406889139.pdf
    • http://gamixpaliwa.pl/images/coin-master-hack-app-android-download_GM406889139.pdf
    • http://gamixpaliwa.pl/images/free-spins-promo-code-for-coin-master_GM406889139.pdf
    • http://gamixpaliwa.pl/images/collect-free-spin-linms-coin-master_GM406889139.pdf
    • http://gamixpaliwa.pl/images/coin-master-links-for-free-spins_GM406889139.pdf
    • http://gamixpaliwa.pl/images/free-coins-for-coin-master-blogger_GM406889139.pdf
    • http://gamixpaliwa.pl/images/is-minecraft-free-on-switch_GM479516143.pdf
    • http://gamixpaliwa.pl/images/robux-hack-generator_GM431946152.pdf
    • http://gamixpaliwa.pl/images/hack-coin-master-game-apk-download_GM406889139.pdf
    • http://gamixpaliwa.pl/images/robux-get-com_GM431946152.pdf
    • http://gamixpaliwa.pl/images/gameoffice-net-hack-coin-master_GM406889139.pdf
    • http://gamixpaliwa.pl/images/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • http://gamixpaliwa.pl/images/wurst-hacked-client_GM479516143.pdf
    • http://gamixpaliwa.pl/images/coin-master-code-hack_GM406889139.pdf
    • http://gamixpaliwa.pl/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://gamixpaliwa.pl/images/coin-master-spins-hack-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047a2.bin
7d8fb153751e92d8be1d40916c8871459ea464c1fd587266b7f43e10bc57bc8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x47A2 25180 bytes
font_01_sfnt_off00007fd6.bin
0e2f08fbfaf79afb1572705eb5799f41bcba8b5506d26f042cd240ae7feb21e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD6 18248 bytes