Malicious PDF — malware analysis report

Static analysis result for SHA-256 3286d90d4246bb9f…

MALICIOUS

PDF

35.3 KB Created: 2021-05-20 12:51:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d03648b36fbc51f799a3305ae0c6905e SHA-1: 5663c124b0416dcd47d335e9fd3fa08322bb1c79 SHA-256: 3286d90d4246bb9fcbf00e59068fbb4b9c0da0b851d44ac1b58b1387b0e0e476
82 Risk Score

Malware Insights

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

The document contains multiple lures for "free" in-game currency or generator tools, directing users to external URLs. The presence of an MFA lure suggests a potential credential harvesting attempt. While no scripts were explicitly extracted, the ML classifier and embedded URLs strongly indicate malicious intent, likely to download a second-stage payload or redirect to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.xyz/app/835599320/free-tiktok-comments-game-hack PDF link annotation
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/rbx-robux_GM431946152.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mtiwelding.co.uk/admin/ckfinder/userfiles/files/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000303f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303F 25156 bytes
SHA-256: 2d61cafd383f0ad2eb8c18f146030520cd0d0fb29aa9afbdb92e6454708a6b77
font_01_sfnt_off00006a51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A51 17716 bytes
SHA-256: be925199a27c2d273bbfb828ef38ce2fcf452edcc9d534dc6164d07d4183a457

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