Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc274573e5b8a38…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 02:08:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 033ed2475a0bc638c237dc00c912ecc2 SHA-1: bc96986b42679e59b29c191e6dcba95e9c83fa9f SHA-256: 3fc274573e5b8a386c385a01ba6306b1b2a466aa395aa5e5bf85a458ca05ae09
62 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites advertising game hacks and cheats, such as '100k Robux Hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a visual download lure indicates a phishing or social engineering attempt. The primary goal appears to be tricking users into downloading potentially unwanted or malicious software from the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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 https://netcdn.tw/app/431946152/100k-robux-hack-game-hack
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-hack-version-download-2021_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-team_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-generator-no-survey_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/are-there-any-free-swords-in-roblox_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-free-link-2021_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/coin-master-hack-app-link_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-spins-coin-master_GM406889139.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-free-online-game_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/how-to-get-free-robux_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/minecraft-hacks_GM479516143.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-today_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/pokemon-go-free-redeem-codes_GM1094591345.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-just-click_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hacks-for-jailbreak-in-roblox_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/roblox-its-free_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/hack-para-roblox-de-robux-2021_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://www.gotsolution.se/uploaded_files/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005188.bin
cd05c64d15581666297e31a83eb2ddf7f793baa824f3a501cd034400e062351c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5188 26056 bytes
font_01_sfnt_off00008cef.bin
42f05efb0fe3ccd20738a1067932f3149c440ee232b5dd67b4f24af52f1dcd80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEF 18528 bytes

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