Malicious PDF — malware analysis report

Static analysis result for SHA-256 40248325f688be31…

MALICIOUS

PDF

40.4 KB Authoring application: LibreOffice Draw
MD5: c2f290a1250615422ea1c63d5da105be SHA-1: c02427dd91da56f49ffc5d8450792846779074c0 SHA-256: 40248325f688be312c3f260391e7e118ee7c1c633cda14890b47b2e8d0bc5bc2
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to other PDF files, a technique often used for SEO poisoning or to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent. The heuristic 'PDF_SEO_LINK_FARM' explicitly identifies the mass external PDF link farm, with the primary URL being http://mixbotanicals.com/uploads/1/3/0/4/130435725/64cb20ebd08c8.pdf. This suggests the document's purpose is to redirect users to potentially harmful 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://mixbotanicals.com/uploads/1/3/0/4/130435725/64cb20ebd08c8.pdf
    • http://kempnermethodist.org/uploads/1/3/0/6/130603773/ebb018e51.pdf
    • http://commongroundsphilly.com/uploads/1/3/0/6/130604601/wofize_rosegibonasepud_velegew_bexosozefej.pdf
    • http://kgwritingservices.com/uploads/1/3/0/4/130489082/figajafonatado_rijofavuvexex.pdf
    • http://taozhiyao.com/uploads/1/3/0/6/130621205/jubijuvaraweguram.pdf
    • http://slocampnpack.com/uploads/1/3/0/4/130490786/rubafowunavasipapa.pdf
    • http://ninamire.com/uploads/1/3/0/3/130379590/6a32a.pdf
    • http://bodyworkbybarb.com/uploads/1/3/0/4/130493248/130493248.html#granny+hack+apk+1.+5

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000011aa.bin
961dac0faf06719d157fc04702a0f0561ff68de3e13e8b42d11bf5ed42af244e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA 8420 bytes
font_01_sfnt_off00006303.bin
278c8bd8c9809cccfd622338e23d3dfc9d5c06575ed56298d8381ea91943abb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6303 2680 bytes

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