Malicious PDF — malware analysis report

Static analysis result for SHA-256 226a05231a47aa77…

MALICIOUS

PDF

37.7 KB Created: 2020-03-27 04:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0ed5508436189467c049df6f64e6d09c SHA-1: 437fbeac5868d250d78f54a57644d8cbd5d0f8de SHA-256: 226a05231a47aa777775abd05253fe40d01a51634d9d15532da83789bc07d8d1
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Dropper.Agent-9018102-0 and an ML classifier output of 0.999991. The primary attack pattern involves a link farm of 30 external PDF documents hosted across numerous domains. The document body contains obfuscated text and references to these external URLs, suggesting a coordinated effort to distribute malicious content or manipulate search engine results. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.Dropper.Agent-9018102-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9018102-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://foundationofthekoegles.org/uploads/1/3/0/4/130488698/130488698.html#que+es+el+civismo+y+urbanidad
    • http://www.stylebydesiree.com/uploads/1/3/0/4/130483184/8491001.pdf
    • http://www.trulynature.ca/uploads/1/3/0/7/130739596/3a2b7.pdf
    • http://thecaravanbarco.co.uk/uploads/1/3/0/2/130271124/favex-dixinotawisakiw-kuzolinenoximog-jizetur.pdf
    • http://bohemianbuddah.com/uploads/1/3/0/6/130605153/goxaf.pdf
    • http://weeblyhost.tigs.ie/uploads/1/3/0/8/130874175/gawawuziweta-xoluradar.pdf
    • http://isrconsultingllc.org/uploads/1/3/0/7/130775961/8096d861c449ed.pdf
    • http://shannonsharper.com/uploads/1/3/0/4/130488846/puruzasifojo.pdf
    • http://priyarockets.com/uploads/1/3/0/7/130776720/befal.pdf
    • http://infiniteserenityspa.com/uploads/1/3/0/8/130874053/duvex_sajema_siseno_xemulox.pdf
    • http://htmcounseling.com/uploads/1/3/0/6/130621002/1459880.pdf
    • http://www.felicecasa.com/uploads/1/3/0/4/130436492/rolazuvefuzafor.pdf
    • http://clicknimage.com/uploads/1/3/1/0/131071157/katimawemixok.pdf
    • http://ozarkdalecountyhumanesociety.com/uploads/1/3/0/8/130813141/5531860.pdf
    • http://courtneyscreations.shop/uploads/1/3/0/7/130775352/4b83ba04e12e1.pdf
    • http://www.conversionpix.com/uploads/1/3/0/5/130550697/tujegad.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a6b.bin
4904cdda8ab6d37c2d4621ed143c725b3f1e7e18b641ee50155fdf58e4133758		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6B 8092 bytes

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