Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dc241b6563107d…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 07:10:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 919c8a21a13c2cc31e7977e430b91f44 SHA-1: 17a9bfb6e84081035f8a7de70b57ec5fd8c80b1e SHA-256: f3dc241b6563107d9eefba10a8e7ef60c1db91b52a6aa5ab3b4274768ac903c6
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which appear to be SEO-optimized pages related to game cheats and free in-game currency. The presence of a download button lure and a high ML classifier score indicates a malicious intent to redirect users to potentially harmful content or downloads. The document's structure and embedded links suggest it is part of a campaign to distribute malware or facilitate phishing.

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.tw/app/431946152/roblox-naruto-final-bond-cheat-lev-up-game-hack
    • https://repository.umgo.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/nouveau-hack-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/get-free-likes-on-tiktok_GM835599320.pdf
    • https://repository.umgo.ac.id/repository/can-u-get-free-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/how-to-hack-coin-master-computer_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/free-robux-codes-generator_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/how-to-hack-someone-without-their-password-roblox_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdf
    • https://repository.umgo.ac.id/repository/how-to-actually-get-free-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/robux-hack-generator_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/roblox-jailbreak-free-exploit_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/rbx-free-robux_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdf
    • https://repository.umgo.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdf
    • https://repository.umgo.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005284.bin
fbd3329383e60c22290db23c95472aff91020c8cf25a4a09f9e53e82fe97ec5e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5284 24376 bytes
font_01_sfnt_off000089cc.bin
6b7f6e9b0cd4a20ea2b5cb72a8cf86b01d7661735875413e2528a30f35cd93f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 19356 bytes