Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7beec4e73e3882…

MALICIOUS

PDF

37.7 KB Authoring application: Poppler-utils
MD5: c6fdf582f635d6585bc1de1bbd532574 SHA-1: 48f0ccfc1ab0e8633b37ea3e383c5c2919f5f274 SHA-256: 1a7beec4e73e38825c4af37d20b2a47408a846d470424d46ece4987cf176fcb0
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the heuristic 'PDF_SEO_LINK_FARM' and the numerous unknown-reputation URLs suggest a phishing or content distribution campaign.

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://blueconstruction.net/uploads/1/3/0/6/130639076/zipuvoripav_zemikivufule.pdf
    • http://www.jonescophoto.org/uploads/1/3/0/4/130489398/d9a8e967ff61a.pdf
    • http://jinshazongheyulecheng.br3h.com/uploads/1/3/0/5/130588849/9191020.pdf
    • http://ns.waisolutions.com/uploads/1/3/0/8/130814284/vuruluxazela.pdf
    • http://milecreekfarmsixmilesc.com/uploads/1/3/0/3/130313429/sawipifejekedu_piboj.pdf
    • http://bailbondsbuffalo.com/uploads/1/3/0/5/130542727/rikuwoweziro.pdf
    • http://defyinggravity2020.com/uploads/1/3/0/3/130323518/tatujobuk.pdf
    • http://bdplumbingservice.com/uploads/1/3/0/8/130874645/9213436.pdf
    • http://savvyunipay.com/uploads/1/3/0/3/130379104/sififafa.pdf
    • http://www.feine-stoffe-koeln.de/uploads/1/3/0/6/130604358/ninumapomoguxaz.pdf
    • http://springerlawfirmllc.com/uploads/1/3/0/8/130814011/d9de75211263d.pdf
    • http://www.lavenderlovies.com/uploads/1/3/0/5/130588244/767971.pdf
    • http://aliciashouse.net/uploads/1/3/0/6/130620547/707cdf.pdf
    • http://www.panavegastudios.com/uploads/1/3/0/3/130313459/wutitiruguxe.pdf
    • http://dougcanfixit.com/uploads/1/3/0/6/130620693/sujafu.pdf
    • http://aly-raisman.info/uploads/1/3/0/6/130622009/4524e99.pdf
    • http://mobastrategy.com/uploads/1/3/0/7/130739772/5034684.pdf
    • http://2mdesignlab.com/uploads/1/3/0/5/130540366/7b2b3c.pdf
    • http://hostmaster.4140designs.com/uploads/1/3/0/6/130639180/130639180.html#agilent+1260+infinity+autosampler+thermostat
    • http://www.panavegastudios.com/uploads/1/3/0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003519.bin
5b00d87cfff50b1a29efd2bdfd70236cdff6628096041db85e0b909af936f2fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3519 8240 bytes

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