Malicious PDF — malware analysis report

Static analysis result for SHA-256 1025fa1cd428779d…

MALICIOUS

PDF

35.1 KB Authoring application: Pdftk
MD5: 6c1d34dfa55cb8eb545a8f75dc061958 SHA-1: c1d84203f59a5e9b2e747d126847fc7e2f6e66b4 SHA-256: 1025fa1cd428779d78c7e7ff39952f5ceb0176f3b8e67824b41f360bf14334b1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to distribute malicious content. The presence of a 'visual download button' heuristic further supports the idea that this document is intended to trick users into downloading further malware. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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
  • 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 http://dorota.blog/uploads/1/3/0/7/130776755/71bfe758633.pdf
    • http://elenasanesi.co/uploads/1/3/0/4/130483087/42cdd3718e6.pdf
    • http://www.taylorperryinteriordesign.com/uploads/1/3/0/2/130271131/doraxofovapukivufagi.pdf
    • http://tryhardkitchen.com/uploads/1/3/0/4/130483895/joxub-nuzutu-potevu.pdf
    • http://www.mrhendersonclass.com/uploads/1/3/0/3/130312968/gozutufikasa.pdf
    • http://northeastwildernesscompany.com/uploads/1/3/0/4/130477351/99039087336.pdf
    • http://newyorkcityspeechtherapy.com/uploads/1/3/0/4/130475932/af2d46881c0dcde.pdf
    • http://desatascosbarcelona.org/uploads/1/3/0/6/130604798/ac2ab987f6d5.pdf
    • http://my.trssociety.ca/uploads/1/3/0/4/130483632/zuxavomuwewore_fafav.pdf
    • http://missusvicarious.com/uploads/1/3/0/4/130483767/kidovaxiveti.pdf
    • http://ygardens.net/uploads/1/3/0/2/130289332/d3ca3983ca0b3.pdf
    • http://raunig-family.rominastiebenphotography.com/uploads/1/3/0/7/130776672/130776672.html#agitator+design+calculation

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d7.bin
4cee4fa612fe9bcc414fea0fa5dbd5cf66a0d8b5f3e838121c0dc57f2d29f56f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31D7 8084 bytes

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