Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86184f5870c21c5…

MALICIOUS

PDF

37.3 KB Authoring application: Poppler-utils
MD5: 669670f2bbbf1722e88b65690997a0f3 SHA-1: 7e876bc094d1fd1982004b72a7dfd0b627758415 SHA-256: f86184f5870c21c53f6bf78db70c574f64bf6d13387247dae33fab4ee82d5ff1
120 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to other PDF files hosted on various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. This technique is often used for SEO manipulation or to distribute phishing content. The ClamAV detection further supports its malicious nature. No scripts were extracted from this sample, limiting the ability to determine specific payload delivery mechanisms.

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://speakeasyliverpool.com/uploads/1/3/0/6/130621072/zifaneduweseko.pdf
    • http://climatechallenge.nz/uploads/1/3/0/5/130539085/a2e481bbd55cf.pdf
    • http://rimofej.copyrightcontact-1000034829743.com/uploads/2020/01/29/fejejipiwurujute.pdf
    • http://darozozu.esleo.ru/uploads/2020/01/28/pexusa.pdf
    • http://simpler4.me/uploads/1/3/0/5/130544318/nopesa.pdf
    • http://nule.cityglush13.icu/uploads/2020/01/29/wataj.pdf
    • http://neurocogconnect.org/uploads/1/3/0/2/130272352/medutatisu_dizipudevox_sagipuxeda_milaruvu.pdf
    • http://mich-interiordesignllc.com/uploads/1/3/0/5/130544136/lepamimetedozo-gaporadu.pdf
    • http://seydarebai.com/uploads/1/3/0/5/130588787/130588787.html#healthscope+annual+report+2018

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001216.bin
609711e81ac6829ea42b9fe45ceb0c0a03fe0c48e3f70a3f580919ed83551f82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1216 8576 bytes

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