Malicious PDF — malware analysis report

Static analysis result for SHA-256 a913fc1e53454a21…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 01:03:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6d754e7e1e3ba0125167e30881b0553a SHA-1: acc05bbd697987aaa6927b73641250fe911c444f SHA-256: a913fc1e53454a21053ca4c0b923f608a5e1ee3f3145c0842fac4f01fea00bbe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, presented as a link farm, that direct users to websites offering free in-game currency or game hacks. The document body and heuristics indicate a lure for potentially malicious content, likely leading to further malware downloads or phishing attempts. The presence of multiple external links suggests an attempt to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/rbxfree-com-free-robux-game-hack
    • http://katalog.ireyogya.org/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-app-download_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/coin-master-daily-free-spins-25_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/coin-master-hack-tool-access-online-generator_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/free-minecraft-education-edition_GM479516143.pdf
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/coin-master-hacks-no-verification_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/hack-coin-master-pc_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/microsoft-roblox-rewards_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/download-coin-master-hack-mod-apk_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/free-minecraft-realms-to-join_GM479516143.pdf
    • http://katalog.ireyogya.org/repository/coin-master-free-coin-hack_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/robuxmatch-com-free-robux_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/roblox-army-free-robux_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://katalog.ireyogya.org/repository/more-robux_GM431946152.pdf
    • http://katalog.ireyogya.org/repository/coin-master-hack-apk-35-18_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c1.bin
fa889f400530bcdb4012c0550439f77e977c5f489aaabf7e0a8a41ba97cd06c1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C1 25352 bytes
font_01_sfnt_off0000833f.bin
3458f47f0b0e4c5d178391a23bbf01d917f000ba7933fbc297d15d2e5240f022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x833F 18276 bytes

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