Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bbc50a2d0fbbf76…

MALICIOUS

PDF

103.3 KB Authoring application: Karbon
MD5: a58582c703e7bff68ab3e98fd7321070 SHA-1: aa9a97a4ced09fadb54e83909e618a924a158a7a SHA-256: 2bbc50a2d0fbbf76f45e657f1923b7e07a129745f9c10679043e9ad4bf9b0afc
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent. No scripts were extracted from this sample, but the PDF structure itself is indicative of a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://downsideupphoto.com/uploads/1/3/0/6/130639687/xenunat-fofodefedafag.pdf
    • http://safeguardrestoration.ca/uploads/1/3/0/3/130379429/dotoxujadoxidaviz.pdf
    • http://insightmedicine.net/uploads/1/3/0/7/130738641/c1a760aeb214.pdf
    • http://rendopoly.com/uploads/1/3/0/5/130539726/petoman.pdf
    • http://laurenaliceavery.com/uploads/1/3/0/6/130640197/filopufuvo-kadotiluxi-xosusuputenati-zusajewuzo.pdf
    • http://legacyfellowship.net/uploads/1/3/0/6/130620800/a20fbca9382857.pdf
    • http://nevebros.net/uploads/1/3/0/6/130621557/c6636e4aa1.pdf
    • http://nextpathfinance.org/uploads/1/3/0/3/130313471/dawupenufanesiredi.pdf
    • http://myria-anthi-essential-oils.com/uploads/1/3/0/7/130740514/loperonimakixu-detite-viridugijinuza.pdf
    • http://motwh.org/uploads/1/3/0/7/130738632/komebumak.pdf
    • http://erinmcwhorter.net/uploads/1/3/0/4/130483866/759962d31.pdf
    • http://collectxt.com/uploads/1/3/0/3/130323285/4832694.pdf
    • http://michiganlegalmalpracticequestions.com/uploads/1/3/0/7/130740514/42cc5f9274b30b.pdf
    • http://perseverancemanagement.com/uploads/1/3/0/7/130740045/regasuza_wilukafine_niziwosugoxugu_vazozefilujado.pdf
    • http://southeastjet.com/uploads/1/3/0/4/130488362/lofakazebusuxiboferu.pdf
    • http://nourishsinglemoms.org/uploads/1/3/0/2/130273894/juzorobasumejaseji.pdf
    • http://dildots.com/uploads/1/3/0/5/130551191/4395032.pdf
    • http://marilusdesigns.com/uploads/1/3/0/8/130813898/130813898.html#cxc+english+multiple+choice+questions+with+answers+pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001667.bin
e53ac7d9e2926d5dd62ffed1925936cf615fcf5326151cc62bb5ebaa4808a1d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1667 8752 bytes
font_01_sfnt_off0000d49f.bin
e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD49F 2652 bytes

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