Malicious PDF — malware analysis report

Static analysis result for SHA-256 35a60a1b10902c6a…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 14:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 72013be525e4b2d0bd356f5b0c0763f9 SHA-1: e855e024fdb82703cf19813978c9ca1e925e0958 SHA-256: 35a60a1b10902c6a4b4531fe85817bc99330c96bedc17613c6c83e67b5f17707
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are presented as 'hacks' or 'cheats' for popular games like Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/how-to-hack-in-cafe-v.4-in-roblox-game-hack, suggests a lure for downloading potentially malicious software disguised as game cheats. The presence of a large number of external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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/how-to-hack-in-cafe-v.4-in-roblox-game-hack
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-minecraft-client_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-hack-apk-no-survey_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-abs-t-shirt-free_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-minecraft-account-list_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hacks-for-roblox-jailbreak-noclip-no-email_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-para-island-royale-roblox_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-modded-minecraft-server_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/minecraft-toolbox-premium-apk_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/www-roblox-com-free-robux_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-hacks-2021_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-spins-hack_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/https-rbxcity-com-free-robux_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-free-online-game_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/bubble-gum-sim-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003109.bin
4a421baadc6fa3226d5863adb56363fbca5f17681fa4021703d1255a0d408f2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3109 22236 bytes
font_01_sfnt_off00006291.bin
84e7f7356ee9155aa3991eae760572424692cf2553c3547e1d9260158999a621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6291 19084 bytes

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