Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8df4733d31b21d4…

MALICIOUS

PDF

38.6 KB Created: 2020-03-27 04:37:25 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 068bffc6b197e992620785f16626526f SHA-1: 9e566cd8c8f688a8b94374f482d6b0a6740f7aad SHA-256: a8df4733d31b21d4447753c72233289f00f6fabf0cadf37a6a25433c859366ff
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or distribution network. The document body contains garbled text and a URL, suggesting it is not intended for direct user consumption but rather as a vehicle to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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-9254126-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9254126-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://sharpcollarmate.net/uploads/1/3/0/4/130488700/130488700.html#cuales+son+las+operaciones+aritm%C3%A9ticas+b%C3%A1sicas
    • http://clergycloud.org/uploads/1/3/0/5/130588807/69eea95ba5f0.pdf
    • http://anonymousbananapumkinspice101.com/uploads/1/3/0/6/130604338/74be912c.pdf
    • http://ningaloolimited.com/uploads/1/3/0/8/130814421/672004.pdf
    • http://aaronclewislitlehouseoffaithproductions.com/uploads/1/3/0/8/130813509/safopuvasa.pdf
    • http://sweetpeamaternity.ca/uploads/1/3/1/0/131070198/1870943.pdf
    • http://charlestongreendesigns.com/uploads/1/3/0/5/130589040/zijid-kerog-netavaxulin-rotuxezinek.pdf
    • http://theinsuranceguy.agency/uploads/1/3/0/6/130639197/0954e1c0.pdf
    • http://bluesmokeband.com/uploads/1/3/0/7/130738647/04a972b8.pdf
    • http://abigailfreemankarin.com/uploads/1/3/0/8/130873794/sutudapizodaval.pdf
    • http://erintatro.com/uploads/1/3/0/5/130540172/6591753.pdf
    • http://uniqflo.com/uploads/1/3/0/4/130488299/41f66599.pdf
    • http://rebeccasmithphotography.org/uploads/1/3/0/6/130621498/3079759.pdf
    • http://www.thoroughbredalliance.org/uploads/1/3/0/5/130590076/lukadizo.pdf
    • http://thefirstresponsegroup.org/uploads/1/3/0/6/130620929/5a349d023c0.pdf
    • http://27waterfallsshoreexcursion.com/uploads/1/3/0/6/130604637/0a99b8.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_off00006a17.bin
d806d79346b9e806122098648c99a944719e53f6c70c55f5935473c2e5e8fe6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A17 8964 bytes

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