Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5dc0eb621275337…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 12:44:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bcaaffbf329749081d25a430f5f2cb8a SHA-1: 88002bad4a10368941bb463043cf867360ea0662 SHA-256: a5dc0eb62127533778d1c07e31866cf1cffacd7e88368b66266867b145851c42
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was generated by wkhtmltopdf and contains a large number of embedded URLs, forming a link farm. The document body and embedded links heavily promote "Free Robux" and game hacks, indicating a lure to trick users into downloading malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

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/free-robux-on-phone-2021-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-2021-forum_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/je-de-hacking-sur-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-stuff-in-catalog-in-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-hole-in-the-wall-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-open-cheat-engine-in-roblox-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/cheat-engine-roblox-this-game-has-shut-down_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/minecraft-windows-10-free-code_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hacks-for-roblox-vehicle-simulator_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-and-obc_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-funny-roblox-outfits_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdf
    • http://opac.akafarma-aceh.ac.id/repository/nicsterv-hacking-people-and-giving-them-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-royale-high-cheats-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/can-oyu-sell-a-roblox-shirt-for-free_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-card-collection-link_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/april-fools-day-2021-hack-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-youtube_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed1.bin
307798b5986afc1e975c0b84193577d0a4b4e8b4d90a0e00e7ddb632a2dbc805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED1 22292 bytes
font_01_sfnt_off00006076.bin
e768c609ee3380fa36506a073330950213c388daca655f84e660214077d9fed2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6076 19436 bytes

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