Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ca5871af6b76d6…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 01:22:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2095caaac234963bf09582a641c3c76f SHA-1: ae667e8418e6fc39fd6a042014d16fd0911ba826 SHA-256: 78ca5871af6b76d6edd2031a8a25bd3b651860660f36d6dd6fe33746716d9b2f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a primary URL that appear to be part of a link farm designed to lure users with promises of game cheats and free in-game currency. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into clicking through to potentially harmful sites. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam 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-group-gets-hacked-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/zyrus-12-roblox-hack-exploit_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-roblox-lumber-tycoon-2-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-promo-codes-october-2021-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-robux-free-bekommen_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/clothes-on-roblox-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/build-roblox-bloxburg-mansion-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-roblox-trolling-tips-for-frappe_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-free-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-hacks-download-free-dll_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_off00003026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3026 21660 bytes
SHA-256: 333b1836ef185208713cde4e257a1fa1a042049cca9bec6fdb31215a2c8ac51e
font_01_sfnt_off00005f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F99 19252 bytes
SHA-256: d565cacf68b6f676ebd258332ca406120aaa962f1e16c4ec27d9f2fd4affd92b

Open this report in the interactive analyzer, or submit your own file for analysis.