Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e50107255b752ac…

MALICIOUS

PDF

35.9 KB Created: 2020-05-25 12:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f839a3f81daa73518289a410a2a8e87d SHA-1: e6c514d623bfbf98d6720125983aef22af0229bb SHA-256: 7e50107255b752ac4d79518188fc9c1371163a7b7b15b6a68c7ae9e9d7c1991f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous unknown-reputation URLs supports this assessment. No scripts were extracted, but the PDF structure itself is indicative of a link farm or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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://fr.sondrafinancialservicesllc.com/uploads/1/3/1/4/131438776/131438776.html#nyc+the+scent+of+peace
    • http://tlrclassicslimited.com/uploads/1/3/1/3/131398251/bukadokazifegodij.pdf
    • http://fnqconsulting.com/uploads/1/3/1/6/131636766/tilejevilisijajujas.pdf
    • http://v3accounting.com/uploads/1/3/1/3/131379029/b05a337eac01a45.pdf
    • http://graflandscapedesign.com/uploads/1/3/0/6/130622051/9160625.pdf
    • http://kes.education/uploads/1/3/0/7/130776254/8e99e29ee638.pdf
    • http://360casecamp.com/uploads/1/3/0/6/130621814/gelupajopuwuxaru.pdf
    • http://meismany.com/uploads/1/3/1/3/131379586/4930902.pdf
    • http://vindcommunications.net/uploads/1/3/0/9/130969428/680421.pdf
    • http://gourmetguides.org/uploads/1/3/0/5/130588663/2037840.pdf
    • http://jlynnnutrition.com/uploads/1/3/0/6/130639246/fesas.pdf
    • http://liqiyue123.com/uploads/1/3/0/8/130873875/lumorideziz.pdf
    • http://koawarriors.com/uploads/1/3/0/5/130588731/7313527.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608b.bin
6c37911c2160a02e2fe021714be3fbab6da8528c59a1423b9a8b57b908b8a82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 12000 bytes

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