Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a7dc346248a810…

MALICIOUS

PDF

43.4 KB Created: 2021-06-03 09:40:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aeb62739b7b77f14a4c803e57aa0964d SHA-1: add6c24d690143c5b46a5552c0ae7f1808dfa50b SHA-256: 29a7dc346248a810ca1965a140ff75f303c05f4c9ad3801a8e8f1a4f217a2e21
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a download button lure further supports a malicious intent. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious functionality, likely related to distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/mcpe-game-hack
    • http://clinicamanila.com/ckfinder/userfiles/files/is-minecraft-java-edition-free_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/roblox-apk-hack_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-free-fire_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/free-robux-hack-us_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/you-promised-my-son-free-robux_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-attack-block-hack_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/robux-generator-without-human-verification_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/coin-master-hack-twitter_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/free-texture-packs-for-minecraft-pe_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdf
    • http://clinicamanila.com/ckfinder/userfiles/files/freecoins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005222.bin
c82a74c03d42922c9d038ae6b2a9f6553a2f8c6ea9bbbb108b16a7bc8b4134ea
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5222 25036 bytes
font_01_sfnt_off00008a23.bin
bad2551fb36a1ff37c0a2928a0b0bdd7baf715808b6c6c89c87aa6c39ddc14cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A23 17292 bytes