Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e79dc8a035dda1a…

MALICIOUS

PDF

37.4 KB Authoring application: Adobe PDF Library 9.0
MD5: 851d86144e06cbfc1f56015ed2d76881 SHA-1: c1587a99a06583d39a463d285b5955797f54ade2 SHA-256: 8e79dc8a035dda1a9afde61afb85cf1e8c41ccd4b82fca0ba37887fe9671a34f
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link farm of 20 external PDF files, masquerading as TOEFL practice tests. The ClamAV detection 'Pdf.Phishing.TtraffRobotInstall-7605656-0' strongly suggests a phishing or malicious redirection campaign. The embedded URLs are likely used to distribute further malicious content or lead users to phishing sites.

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://motherhenmusic.org/uploads/1/3/0/7/130739864/sirelosor_nomogazigoruxep.pdf
    • http://seomontrealexpert.com/uploads/1/3/0/6/130621431/3cfa20c682860.pdf
    • http://kingdommusicrecords.com/uploads/1/3/0/7/130740378/rikososapopifal-fufif-wuneniwijilaf-pipalefu.pdf
    • http://www.conrecetasenlasruedas.com/uploads/1/3/0/3/130323612/nurefexoxow.pdf
    • http://dressple.com/uploads/1/3/0/2/130273931/4114059.pdf
    • http://nw-enviro.net/uploads/1/3/0/4/130436258/caaf2f552a79299.pdf
    • http://stadtentdecker-in.de/uploads/1/3/0/2/130272609/wusovif_sirumeju_jekugidef.pdf
    • http://schreckdevelopment.com/uploads/1/3/0/4/130477110/6626447.pdf
    • http://alexhammerschmidt.com/uploads/1/3/0/7/130775556/a54baf.pdf
    • http://michaelroll.net/uploads/1/3/0/7/130775286/1415574.pdf
    • http://ls7xy.bpmtc.com/uploads/1/3/0/8/130814216/130814216.html#peterson+toefl+pbt+practice+test+pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003b71.bin
47c93eed5dc93bc42ed4295a3b445e80b7bc00a08638a6b904f9566d0210f549		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B71 8192 bytes

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