Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde4ac6ac03b4a2d…

MALICIOUS

PDF

38.0 KB Authoring application: GIMP
MD5: 320a0ebe44bda96a6d5334c7a601f1da SHA-1: a5068438787c9a5792d5b13184c288d3ff07b2da SHA-256: cde4ac6ac03b4a2d97377988220182bc787c29fb1c6e477b37060b08aba28b30
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The ClamAV detection and ML classifier also flag this as malicious phishing content. The embedded URLs likely lead to further malicious content or phishing pages. No scripts were extracted from this sample.

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://vet77.ru/uploads/2020/01/28/fedeziruxamuwat_weres_gujabusa_novibajepipe.pdf
    • http://millikenentertainment.net/uploads/1/3/0/6/130605403/gavanakupofagil_wufutiraragogaw_kejeverixotodiv_mefoludajasoto.pdf
    • http://nutricionbasadaentrofologia.com/uploads/1/3/0/5/130590535/mezej-lefujenexujagu-bavum.pdf
    • http://wowogare.tehnika-ask.ru/uploads/2020/01/28/c79c3.pdf
    • http://rockyourdaybook.com/uploads/1/3/0/6/130605332/8834258.pdf
    • http://cityonloc.com/uploads/1/3/0/6/130604026/130604026.html#lord%27s+prayer+apostles+creed+rosary

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000115d.bin
49e423221627e718065e5665307b40c9cd5f9779a51acd04c398dd18423f0e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115D 8396 bytes

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