Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d04425b1308d0a2…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 06:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3c9e0f1e1c9e95b4f92476865d44d9de SHA-1: e6f80909fb7d34d902edc74cc6ae51062e4faacb SHA-256: 6d04425b1308d0a2df7e5a796c9f9a3a87d30addf3f63ff3d41f2e71a04e105e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are SEO-optimized to appear as legitimate resources for obtaining free Robux. The document body, though heavily obfuscated, contains references to 'Roblox Fun Com Free Robux' and a URL that aligns with this theme. The presence of a 'download button' heuristic further suggests a malicious workflow aimed at tricking users into downloading a payload or visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/roblox-fun-com-free-robux-game-hack
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/give-me-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/www-roblox-com-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-you-get-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/how-to-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-no-verification-at-all_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-gang_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-hack-tool-for-pc_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-coins-and-spins-app_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-free-spins-2021_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/coin-master-game-free-spin-download_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-pink-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-land-free-robux_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/roblox-royale-high-diamond-hack_GM431946152.pdf
    • http://libsmpn1balongpo.sch.id//repository/google-play-coin-master-free-spins_GM406889139.pdf
    • http://libsmpn1balongpo.sch.id//repository/free-robux-without-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fae.bin
1f836de04be79e9e111c96e6fe282fdbe353469c8f28a97485f37c1fa34e3cd6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FAE 26896 bytes
font_01_sfnt_off00008b10.bin
9560f0e6f9a4e6be006083e3696e79311a38bb173f302534750988b281bae61f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B10 18348 bytes

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