Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc5679e940ef2db8…

MALICIOUS

PDF

34.6 KB Created: 2021-06-26 04:29:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 481c3e7d3415cb097abb34ade0b5a250 SHA-1: 2a5297fd95fa44858b1b9ba10de312cae5fdd117 SHA-256: fc5679e940ef2db8b4dbc2e8da51c2190ade1b013a9b1f3246cab1bc7b411753
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 masquerade as hack tools or generators for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for cheats or exploits. The ML classifier also strongly flagged this PDF as malicious. The presence of these links and the deceptive content points to a phishing or malware distribution attempt.

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/roblox-hack-tool-no-survey-no-download-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/account-stealing-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-without-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/anti-afk-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/cheat-codes-roblox-solar-strike_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/pokemon-go-free-bot_GM1094591345.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-audio-sounds_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E92 22304 bytes
SHA-256: 4c43044dfbd1437af01867756076a68c4d7aa328981ad3cff9e92629f35ff982
font_01_sfnt_off00006040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6040 19596 bytes
SHA-256: cb0da832fbbab2d59da88efe15f78bf7aa40727f5a7ea84386675e21c88e7e7c

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