Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac4b6614b7b75aee…

MALICIOUS

PDF

33.4 KB Created: 2021-06-30 11:47:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f4d23d42f4ff4a74a1b0f34ec829bc0c SHA-1: 9575273148dda5e2ecc03b674802c7b17eb2d10a SHA-256: ac4b6614b7b75aee3f5fb76d7ff70af6599df5409badc5148d0375ea12bc343d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF links, suggesting a link farm designed to drive traffic. The document body and extracted URLs indicate a lure for game-related cheats and hacks, likely to trick users into downloading malware. The ML classifier strongly flagged this PDF as malicious.

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/how-to-get-free-private-server-roblox-game-hack PDF link annotation
    • https://creationegyptco.com/userfiles/files/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-exploit-injector-hacks_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/freerobux-co_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-hack-and-cheats-for-exploit-free-download_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/robux-cheat-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spin-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/computer-roblox-hacking-apps_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-offers_GM431946152.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_off0000300e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 20668 bytes
SHA-256: d62ac89ddfbbe265216165a3c909a64271095aeabfb1042ce349a07ded0fec21
font_01_sfnt_off00005c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C88 19304 bytes
SHA-256: 0875ebbe8529148962febdf88ff1f75fbeedc4cec5fb65d160205138da61abe0

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