Malicious PDF — malware analysis report

Static analysis result for SHA-256 b87e09d557e4c462…

MALICIOUS

PDF

48.8 KB Authoring application: QPDF
MD5: 1431ab0da550af1f3f23520f3768bd9d SHA-1: efce6697b67d8b7785c281ce9421d4cacda217ca SHA-256: b87e09d557e4c4624718044b97bd54ce6fc32761889ed0a13189907abe01e456
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO poisoning or distributing malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The primary attack pattern involves directing users to a network of linked documents, likely to host further malicious payloads or phishing content.

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://dogodogo.ru/uploads/1/3/0/7/130739503/xejirazofezamimar.pdf
    • http://onamishon.com/uploads/1/3/0/6/130639632/ladafifavodap-bujumurivolixoz.pdf
    • http://gatewaytakanini.co.nz/uploads/1/3/0/5/130588551/rapik.pdf
    • http://simonshotdogs.com/uploads/1/3/0/6/130621305/wizoponuw.pdf
    • http://daytonconcretecontractors.com/uploads/1/3/0/5/130551001/zirinib_jezasitujes.pdf
    • http://mizfamphoto.com/uploads/1/3/0/6/130621989/fufifa.pdf
    • http://minnickmanagementhoa.com/uploads/1/3/0/4/130483773/a6d89a939f34.pdf
    • http://innovationbroadcastservice.live/uploads/1/3/0/5/130539935/650ea41c71ef81.pdf
    • http://prettylittlethings.ca/uploads/1/3/0/2/130291036/293b0a76e67cb.pdf
    • http://jivijelipo.site111.ru/uploads/2020/01/29/gusixiwanajug_gonagal_ziwabapiwutaf.pdf
    • http://magicklymodern.shop/uploads/1/3/0/4/130436285/borazib_medesafopexe_lisavimeg.pdf
    • http://michaudwellness.com/uploads/1/3/0/4/130435757/130435757.html#what+causes+non+epileptic+attack+disorder

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012fd.bin
6e6a53d5a669b9728d1a1997194f47b18dce4596b315b1cf8ff26989fbdc87f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD 8632 bytes

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