Malicious PDF — malware analysis report

Static analysis result for SHA-256 57250f4e51ea8df2…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 04:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cea5c226011a78aba7506d03d02fce7e SHA-1: ebe23cd11808f9fed2442bac5cbfc14acc60df0d SHA-256: 57250f4e51ea8df29dfab9483943e0f4d07613b5526dcd675b750f7739eaa64d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which are SEO-optimized and point to game-related hacks and cheats, suggesting a link farm or phishing lure. The presence of a "download button" heuristic further supports the idea that the document is designed to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and embedded links indicate an attempt to redirect users to external resources, likely for malicious purposes.

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-hack-roblox-im-poison-game-hack PDF link annotation
    • http://ghi.dk/billeder/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-cash-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/hot-to-hack-roblox-on-mac_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-hack-phantom-forces-2021-roblox-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/farm-life-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-games-on-ipad_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/tiktok-free-beer-for-a-year_GM835599320.pdfIn PDF document text
    • http://ghi.dk/billeder/robux-today_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://ghi.dk/billeder/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/comment-cheat-dans-boku-no-roblox-remastered-roblox_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-hacks-dll-downloads_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_off00002f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F8C 22648 bytes
SHA-256: b406c93c39a9dd7bf511e4c84c7354c890b7119b801528612408730ab6dcc76b
font_01_sfnt_off00006269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6269 19356 bytes
SHA-256: 95976604cec37d5b417e6dc2d74f901e0ac9463dfa82f04ed2c85d158c939835

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