Malicious PDF — malware analysis report

Static analysis result for SHA-256 edda4030395af00e…

MALICIOUS

PDF

47.0 KB Created: 2021-06-09 04:50:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a7259cfc56385f3eba5c9e1af613586c SHA-1: 09a5067a174ebf75d9a645b9fac4494c3260b963 SHA-256: edda4030395af00ec9cf67d56cfffabd005824db6516f363c83e78e50b1b63b6
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 link to sites offering game hacks and free virtual currency, indicative of a phishing or scam attempt. The heuristic firings, particularly the PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly suggest malicious intent. The document body, though partially corrupted, contains references to 'Roblox Free Robux Gift Cards' and a URL associated with game hacks, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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-free-robux-gift-cards-game-hack
    • https://library.uigm.ac.id/repository/hack-coin-master-using-cheat-engine_GM406889139.pdf
    • https://library.uigm.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • https://library.uigm.ac.id/repository/minecraft-windows-10-edition-free-download_GM479516143.pdf
    • https://library.uigm.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • https://library.uigm.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • https://library.uigm.ac.id/repository/hack-the-coin-master_GM406889139.pdf
    • https://library.uigm.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • https://library.uigm.ac.id/repository/free-robux-2021_GM431946152.pdf
    • https://library.uigm.ac.id/repository/minecraft-free-install_GM479516143.pdf
    • https://library.uigm.ac.id/repository/free-robux-no-apps_GM431946152.pdf
    • https://library.uigm.ac.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdf
    • https://library.uigm.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • https://library.uigm.ac.id/repository/how-to-be-a-admin-in-roblox-for-free_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdf
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • https://library.uigm.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://library.uigm.ac.id/repository/free-robux-for-kids_GM431946152.pdf
    • https://library.uigm.ac.id/repository/cm-spin-link_GM406889139.pdf
    • https://library.uigm.ac.id/repository/fairy-tail-ultimate-adventure-roblox-how-to-hack_GM431946152.pdf
    • https://library.uigm.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005b18.bin
48e9c5e7146e521ef588979985b875c5172241bae896741b73495e8bcf2fa410		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5B18 24724 bytes
font_01_sfnt_off00009429.bin
fe122d4250a34c276358c10e33efa8a40de63b7b6dd0eb7518b6df7ddc959e08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9429 18716 bytes

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