Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a43b8920838cda7…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 06:55:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c450244741c79a7b51c094468797c084 SHA-1: bf478d19b3923c84541a66d6f4f9995718a9ebee SHA-256: 3a43b8920838cda72869e0e5fa39056a7b0b3bcda31303012dc5cf6f7ba7f170
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many of which are structured as a link farm, suggesting a deceptive purpose. The document body and extracted URLs promote 'free Robux' and game hacks, indicating a lure for users to download potentially unwanted or malicious software. The presence of a visual download button further supports this phishing-like tactic.

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/free-robux-addon-game-hack
    • https://www.ashkarco.com/uploaded_files/userfiles/files/boku-no-roblox-hack-cash_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification-no-survey-no-download_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/apps-for-free-robux_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-iphone-no-human-verification_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-hair-with-no-robux-works_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-minecraft-skins-ps4_GM479516143.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/cookie-hack-roblox_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-coins-on-coin-master-2021_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-clothes-on-roblox-ipad_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-robux-without-paying-money-or-typing-password_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-get-free-robux-dylan-grant_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/how-to-earn-free-pokeballs-in-pokemon-go_GM1094591345.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/can-i-play-minecraft-for-free_GM479516143.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/robloxfun-com-generator_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/roblox-crack-hack_GM431946152.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/free-card-collection-in-coin-master_GM406889139.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/is-uc-pubg_GM1330123889.pdf
    • https://www.ashkarco.com/uploaded_files/userfiles/files/claim-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_off00003388.bin
373fd414678b9dbc1f0bd9a0301ed71b9c275d4da015891b1cdff5228bd95847		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3388 22188 bytes
font_01_sfnt_off00006506.bin
75c4df5473136789db73714652f33b30007407a3f63dedbf64319688a2fefcd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6506 18888 bytes

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