Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5ed6335db2d3234…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 06:37:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e06820d106e4079b5c6fbc65ce54c859 SHA-1: bb11aaeaaf56600660f3117e13ae2e38bdeba283 SHA-256: a5ed6335db2d323484b53c5e7f4376331e0d3b9d1a15977b39e989f10ad8d8a9
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are structured as a link farm, suggesting an attempt to drive traffic to potentially malicious content. The presence of a 'download button' heuristic further supports the lure of downloading files. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of 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/hacker-skin-roblox-game-hack
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/cheats-to-speed-city-on-roblox_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/its-free-roblox-ad-released_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-hacks-for-ninja-legends_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-free-money-in-roblox-jailbreak_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-build-a-boat-for-treasure-new-hack-unlimited-money_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-realistic-minecraft-texture-packs_GM479516143.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-hack-the-greenwood-town-roblox_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/box-prizes-earn-free-robux_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-urbis-money-hack_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/fre-shavacado-compilation-roblox-id_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/all-free-clothing-in-roblox_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-apk-mod_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-robux-no-waiting-on-phone_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-hack-for-2021-robux_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/free-items-on-roblox-2021_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/roblox-free-slime-wings_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/how-to-get-free-obc-on-roblox-2021_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/cheat-roblox-phantom-forces-2021_GM431946152.pdf
    • http://simpus.umb.ac.id/pustakaumb/slim7/repository/hacks-for-roblox-case-clicker_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003117.bin
4c3f1ba788ae336fda24711837c91fe129a531f264f7c5ec6b3e1ce9dd1deb89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3117 22700 bytes
font_01_sfnt_off00006400.bin
d757f3432c563f9833bd12606af641f771f7c5a93be1e9aa2ee68ef537049c81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6400 18776 bytes

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