Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc6c953b9a38e0c…

MALICIOUS

PDF

44.6 KB Created: 2021-05-17 15:29:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: aae793331a08dc6612928fe3a4a6b7cb SHA-1: 7ba9179959302e5322efcefa68db08c6f875ee5f SHA-256: 6cc6c953b9a38e0c5d5ae63d0219b6707b55927c86c2340fdc74cb2b7f870b36
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for free Robux and Coin Master spins, with embedded URLs pointing to external content. The PDF_SEO_LINK_FARM heuristic indicates a large number of links to other PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the ML_NYX_PDF_MALICIOUS firing strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/games-to-get-free-robux-game-hack
    • http://brandyourbody.com/images/all-links-for-free-spins-coin-master_GM406889139.pdf
    • http://brandyourbody.com/images/free-robux-with-no-verification_GM431946152.pdf
    • http://brandyourbody.com/images/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://brandyourbody.com/images/robux-best_GM431946152.pdf
    • http://brandyourbody.com/images/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdf
    • http://brandyourbody.com/images/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://brandyourbody.com/images/free-roblox-items-codes_GM431946152.pdf
    • http://brandyourbody.com/images/free-robux-websites-that-work_GM431946152.pdf
    • http://brandyourbody.com/images/coin-master-hack-tool-download_GM406889139.pdf
    • http://brandyourbody.com/images/roblox-jailbreak-hack_GM431946152.pdf
    • http://brandyourbody.com/images/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://brandyourbody.com/images/cool-minecraft-hacks_GM479516143.pdf
    • http://brandyourbody.com/images/best-roblox-hacks_GM431946152.pdf
    • http://brandyourbody.com/images/free-robux-websites-2021_GM431946152.pdf
    • http://brandyourbody.com/images/roblox-hack-generator_GM431946152.pdf
    • http://brandyourbody.com/images/coin-master-tiradas-gratis-link_GM406889139.pdf
    • http://brandyourbody.com/images/how-to-hack-coin-master-pc_GM406889139.pdf
    • http://brandyourbody.com/images/coin-master-hack-apk-download-for-android_GM406889139.pdf
    • http://brandyourbody.com/images/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://brandyourbody.com/images/hacks-minecraft_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004773.bin
b93fbc8c609af258a535d5d56706cb8ff84e72414913d1d35dd825370c70e9b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x4773 24952 bytes
font_01_sfnt_off000080da.bin
02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DA 2912 bytes
font_02_sfnt_off00008ad7.bin
08e91301afb793f0c8f569168ad93911c90315771ef2b58170e32493949df7cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AD7 18608 bytes