Malicious PDF — malware analysis report

Static analysis result for SHA-256 e44f8eeb21a3e283…

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 20:22:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e5885f0dd982f63d57e96a59e9bf5fc2 SHA-1: 0bbf700387d7eaf9950d35f062bc0efad5f5c1c0 SHA-256: e44f8eeb21a3e283c9c4f18e4509ab9eee42b9b66ec62835752d1db88c272b09
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are related to game cheats and free currency, indicating a link farm designed to drive traffic to potentially malicious sites. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the heuristic firing for PDF_SEO_LINK_FARM suggest a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/1330123889/pubg-uc-xtr.com-game-hack PDF link annotation
    • http://berntfoto.dk/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-spins-cheats_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-spins-no-survey_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-re_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-get-minecraft-realms-for-free_GM479516143.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_off00004623.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4623 28564 bytes
SHA-256: c42724ebe9956d10b718c3379d06a4fa8f069fe31fe24ec00288a414d585312b
font_01_sfnt_off00008676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8676 18696 bytes
SHA-256: a78dcadcb900650b078c46f32a5bb32744955132c019707247461961fa288f26

Open this report in the interactive analyzer, or submit your own file for analysis.