Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f1024c49b4aa18…

MALICIOUS

PDF

72.8 KB Created: 2020-12-18 01:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8efcc16cf3cc5f84bb253e31fb5a8321 SHA-1: aa5d8974dcfeff5d3f63d81aa8358dfed8e736a8 SHA-256: d2f1024c49b4aa186195d822a1b4974a496216f08ba2a03c47b9536ffbe36c1f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with one prominent URL pointing to 'trafffi.ru', suggesting a phishing or SEO spam campaign. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://trafffi.ru/123?utm_term=matlab+moving+average+function PDF link annotation
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/0d13472f593.pdfIn PDF document text
    • https://kafubururi.weebly.com/uploads/1/3/4/2/134235359/litibetunakigaj_rirebotuxes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/representing_numbers_in_different_ways_year_3_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/mamma_mia_logo.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/service_costing_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/acrylic_painting_for_dummies_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/14797287545.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/73961526577.pdfIn PDF document text
    • https://s3.amazonaws.com/vatakefojunib/physical_examination_health_assessment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3f91a9e-2296-44dc-8b98-8121b063b448/rulalododuxela.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/39254264937.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/boduvufenesofipadufekomo.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/88222184611.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e13a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13A 5228 bytes
SHA-256: 201eb711df6665095093264155585210ed9571952930255abc94e392d5396a6b
font_01_sfnt_off0000f30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30A 10328 bytes
SHA-256: 397b52d85437f1f24c0c310706535596672d5c1a87a7eea71226c163f73ef03a

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