Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e94fb74c86b51ff…

MALICIOUS

PDF

42.2 KB Created: 2021-05-15 14:05:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6dfa7d1555c57259272dd7b285dd4400 SHA-1: 43d685718d8093e8c824e5488ecfc111e32cf872 SHA-256: 6e94fb74c86b51ff837ffd9ce163159afe05c9fc7c5558ed5eb421499170c108
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a malicious lure, employing a link farm of SEO-optimized PDF URLs to direct users to potentially harmful content. The document body and extracted URLs suggest a theme of free game currency or hacks, a common social engineering tactic. The presence of a password archive lure heuristic indicates an attempt to bypass security controls by encrypting a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 PDF link annotation
    • http://businessmart.ro/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/coin-master-34-5-hack_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://businessmart.ro/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/hack-coin-master-no-verification_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/how-to-get-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://businessmart.ro/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/static-moonactive_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://businessmart.ro/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://businessmart.ro/images/free-spin-link-coin-master-today_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_003_off0000476a.bin
1a129e586737b0515efcfec24b5e4a883ce78939411f5c7d91dbe07f7184fcc5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476A 25924 bytes
font_01_sfnt_off000082d9.bin
3458f47f0b0e4c5d178391a23bbf01d917f000ba7933fbc297d15d2e5240f022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82D9 18276 bytes

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