Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f035bce24eb0549…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 10:42:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 974f3779205ad7051e4c6c482e8dbe2c SHA-1: 7e47c33de557b497018ea5d8464eb98471fd0b6e SHA-256: 0f035bce24eb054965ace4bdad202947fef92b45603a95488d7e5debe315e19f
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are related to game cheats and hacks, suggesting a lure for users to download malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a download button lure further supports the malicious intent.

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/veste-armed-free-roblox-game-hack
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-obby-2021_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-premium-free_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-unlimited-robux-in-roblox-youtube_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-serverside-executor-free_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-fix-elysian-roblox-hack-crash_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/how-do-you-get-free-robux-nisterv_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/pokemon-go-free-apk-download_GM1094591345.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-robux-in-2-minutes-roblox_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/pokemon-go-free-7-km-eggs_GM1094591345.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/best-minecraft-hacked-client_GM479516143.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-coin-master-facebook_GM406889139.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/ulgamesresources-com-free-robux-generator_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-skins-download-free_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-not-fake_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-got-talent-piano-hack-script_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/robux-free-no-hack-is-free_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/hacks-for-de-oride-isle-sanatorium-roblox_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-sword-fighting-tournament-hack-2021_GM431946152.pdf
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-admin-commands-in-roblox-superhero-tycoon_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f79.bin
25ea3de32222d15741454535102f32a7a6f566c495484e609781873e2da810f4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F79 22444 bytes
font_01_sfnt_off000060e7.bin
c6d01f7e0372a53719bf555619f65936330fc005056f847e5118425997079a52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E7 19324 bytes

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