Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8ec086576cee30…

MALICIOUS

PDF

44.9 KB Authoring application: pstoedit
MD5: c30e5aea5324f54e9993608e5be1507f SHA-1: cdb189a6c80f0d39c22669334434af8fc3a2836f SHA-256: fe8ec086576cee305136a838eb91558315a8adbe5fb317c8d5168ed2b5de28cc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO spam or to distribute malware. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' and the ML classifier strongly indicate malicious intent. The primary attack pattern involves directing users to a link farm, likely to achieve a malicious objective through the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://arthurdogsontodd.net/uploads/1/3/0/6/130621706/vodizev_rusupowoxeni.pdf
    • http://shawkeyart.weebly.com/uploads/1/3/0/5/130544826/8452688.pdf
    • http://akermanfinancialservices.com/uploads/1/3/0/2/130291358/9475043.pdf
    • http://funandsun.org/uploads/1/3/0/5/130589302/24df40f.pdf
    • http://pxatl.com/uploads/1/3/0/4/130475955/pitewologidivaxus.pdf
    • http://musicalmonday.org/uploads/1/3/0/3/130313024/nisakujupelewer-rudepegififalo-zigikiwovusobuv-jatiworuke.pdf
    • http://sweetlyavas.com/uploads/1/3/0/2/130270937/e0a1bec.pdf
    • http://buxok.wise-design.ru/uploads/2020/01/28/xusugarokazusajigu.pdf
    • http://planaustral.com/uploads/1/3/0/6/130621015/872881.pdf
    • http://pulsewx.com/uploads/1/3/0/2/130270986/b4d894ba65da8cc.pdf
    • http://authorjulievail.com/uploads/1/3/0/6/130620509/xopodujesuvumid-litavuvutasaned.pdf
    • http://sharedtravel.voyagerwebsites.com/uploads/1/3/0/4/130476183/130476183.html#first+state+super+annual+report

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012ff.bin
613ba1e6b7c68212b1913d3c45a665b1b5d360cef955ef2d86dbc3322da47b98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF 8768 bytes
font_01_sfnt_off00006887.bin
3fa9d5c8d866ca90580c5bc83afd6b4ab33e02a9c9678ac65cf9cc11f7918e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6887 16180 bytes

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