Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca408f29781fa926…

MALICIOUS

PDF

51.6 KB Authoring application: Smallpdf Desktop
MD5: 241302d2632539ac575678a41b6092f1 SHA-1: df61d9ea88e426eeee768995dc4cd8e0b6e30f00 SHA-256: ca408f29781fa92683a19d093848bd19c08cdad4931c69b21b3d272b32b9d5cd
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to other PDF files. The ClamAV detection as Pdf.Phishing.TtraffRobotInstall-7605656-0 and the ML classifier output strongly indicate malicious intent. The embedded URLs are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://mindbody-solutions.net/uploads/1/3/0/7/130740412/95b47d2ac.pdf
    • http://mta-sts.mail.mirkesinsurance.com/uploads/1/3/0/2/130289277/nukinov-sodoro-sexakekekisoja-kuzodetise.pdf
    • http://solarasterling.com/uploads/1/3/0/6/130621072/lewisumig-wunafoxekobete-gaduxi.pdf
    • http://robbenoptics.com/uploads/1/3/0/4/130490117/fuvoxul.pdf
    • http://www.houseofhatts.co.uk/uploads/1/3/0/8/130874511/1847787.pdf
    • http://nashvillerollingpins.com/uploads/1/3/0/6/130620794/supixolikagekatogij.pdf
    • http://mogulmeadows.org/uploads/1/3/0/5/130539074/823371.pdf
    • http://nlccpsw.org/uploads/1/3/0/2/130271051/8489018.pdf
    • http://thomasmontero.com/uploads/1/3/0/7/130775503/d1156b2281.pdf
    • http://kuponyaarts.com/uploads/1/3/0/2/130271094/3745700.pdf
    • http://myecns.com/uploads/1/3/0/4/130488975/6723976.pdf
    • http://www.dorsetheartdoctor.com/uploads/1/3/0/6/130620921/sivejozodudov_kewaraxegusidut.pdf
    • http://madelynnholzwarth.com/uploads/1/3/0/4/130483045/db0d4.pdf
    • http://contemporarypublishing.com/uploads/1/3/0/2/130288722/kenud-lamesiva-fubofarisi.pdf
    • http://veronikasafarova.com/uploads/1/3/0/6/130605216/saderuwofudetosuzofe.pdf
    • http://assessmentsystemscorporation.com/uploads/1/3/0/8/130874519/pitotubuluma.pdf
    • http://mannagaragedoors.com/uploads/1/3/0/5/130588489/benodigixolififew.pdf
    • http://mta-sts.mx.randolphroadrunners.org/uploads/1/3/0/2/130288329/wijawozunatunipu.pdf
    • http://bposrv7.benefitplans.org/uploads/1/3/0/9/130968985/130968985.html#maze+runner+the+death+cure+trailer

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012a7.bin
62804b36aafe69a5f350973f5db0f23188dc2dd1eb2cf63fb753252ed774094d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7 9140 bytes

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