Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d34a71bbeb008e…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 22:52:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eaff96bb4e234f1d0ed8337b184ac6fd SHA-1: 6b60c785d3af06a975e7f0ea39523fa813889d79 SHA-256: 80d34a71bbeb008e58e1af2f347c580e5fa855d3382101385002cce3c55d2776
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs that mimic search engine results for free in-game currency and cheats for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms a mass of external links designed to appear as legitimate resources. The document body, though partially garbled, contains references to these lures and the wkhtmltopdf authoring application, suggesting it was generated programmatically to host these links.

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.tw/app/431946152/roblox-group-free-robux-game-hack
    • http://pustaka-smpn3tpi.com/repository/wwwfree-robux-for-kids_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-t-shirts-on-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-can-you-hack-robux_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-coins-cheat_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-spin-hack_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-make-shirts-on-roblox-for-free_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/cheats-for-coin-master_GM406889139.pdf
    • http://pustaka-smpn3tpi.com//repository/minecraft-diamond-finder-hack_GM479516143.pdf
    • http://pustaka-smpn3tpi.com/repository/minecraft-reach-hack_GM479516143.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-account-hacked-what-to-do_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/roblox-robux-hack-no-human-verification_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/how-to-get-free-roblox-dollars_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/2021-free-migrated-acounts-roblox_GM431946152.pdf
    • http://pustaka-smpn3tpi.com//repository/coin-master-100-spin-slot_GM406889139.pdf
    • http://pustaka-smpn3tpi.com/repository/irobux-free-robux_GM431946152.pdf
    • http://pustaka-smpn3tpi.com/repository/coin-master-free-spins--spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e3d.bin
61cd197578f85608e990071a620012960719a80366ba21ab2c7c53f384a36682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3D 22720 bytes
font_01_sfnt_off0000612d.bin
f48b2ae17e84399e3a6b420fde02f8f729f2240ca84fd7cf9c0f4aab3f14a6ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x612D 18968 bytes

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