Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2aa0acde4cc70c1…

MALICIOUS

PDF

35.8 KB Created: 2021-07-04 00:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 35f7b52f1f36dfb9ba8861a415ae1b7c SHA-1: 9bb6b7013be6e34b7cfdaeac35c7bf3aedaf77d9 SHA-256: c2aa0acde4cc70c14f781dce81c501d3a7b96159bae98581237a51b1b2a74ebb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, suggesting it is designed to redirect users to external sites, likely for malicious purposes such as downloading further malware or engaging in scams. The ML classifier strongly indicates maliciousness, and the presence of SEO-optimized links points to a tactic to attract victims searching for game cheats or hacks. No scripts were extracted from this sample, but the overall structure and URL distribution are indicative of a downloader or redirector.

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/835599320/is-tiktok-free-game-hack
    • http://library.sdkmaterdei.sch.id/repository/unlimited-robux-cheat_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-with-fake-credit-card_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/roblox-prison-life-hack-download-2021-mobile_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/real-free-robux-codes_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/redeem-your-free-robux_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-free-robux-websites_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/roblox-game-what-you-get-free-robux_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/get-free-robux-by-watching-ads_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-into-somebodys-roblox-account_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/use-cheat-engine-with-roblox_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/ghost-simulator-roblox-hacks_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdf
    • http://library.sdkmaterdei.sch.id/repository/cowboy-t-shirt-roblox-free_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/2021-robux-free_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/free-codes-for-roblox-clothes_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/hack-exploit-roblox-2021_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/i-has-cupquake-roblox-he-cheated_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/how-to-tell-if-you-have-been-hacked-on-roblox_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/free-items-in-roblox-using-toy-codes-works_GM431946152.pdf
    • http://library.sdkmaterdei.sch.id/repository/pagina-de-hack-para-robux-gratis_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034e3.bin
7e7daa1088c453fa5275ce1c535d37578a520fce61fa09fd0fd04850c95720e3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E3 23512 bytes
font_01_sfnt_off00006a56.bin
1ad9b968f8d868dc9306eb656e42f80411177ac895833eed5c4e9bc3c7375aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A56 17972 bytes

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