Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb2c8df05b049d3…

MALICIOUS

PDF

34.0 KB Created: 2021-06-22 22:53:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 67fb2a992f3242ac5613bb539c31b08b SHA-1: a6b042a3766e2b611eb893dd68e67733bb834762 SHA-256: adb2c8df05b049d3f951cbfafe9b59f38018d526d6c4214583ed2aa18790561e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links and a document body that promotes free Robux generators and game hacks, indicating a lure for users to download potentially malicious content. The presence of a PDF link farm heuristic and the ML classifier strongly suggest malicious intent. The primary attack vector appears to be tricking users into clicking malicious links disguised as download opportunities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-generator-2021-no-verification-game-hack
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-kick-a-player-with-cheat-engine_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/games-like-roblox-and-minecraft-but-free_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/pokemon-go-free-games-online_GM1094591345.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/wurst-18_GM479516143.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/mcpe-master-free-coins_GM406889139.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-complete-handbook_GM479516143.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/get-free-robux-2021_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/http-appsmob-info-coin-master-hack_GM406889139.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-more-robux-for-free_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-codes-no-human-verification_GM431946152.pdf
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-112-2-hacked-client_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c56.bin
bd6368bce12c947c1e48de78c7e740ac1c9c7f4600e06b8c24a93aaeb301f0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C56 22652 bytes
font_01_sfnt_off00005ea4.bin
ff76f212f6d9f753b48371dd836a27d44b808eff81fdcf249df7d54af6de1dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA4 19476 bytes

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