Malicious PDF — malware analysis report

Static analysis result for SHA-256 8537aba2a248c944…

MALICIOUS

PDF

70.5 KB Created: 2021-03-04 11:06:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: a05daef913cca166140507e5b6026d4e SHA-1: 01243f87bf6f582666b3306b0cf5f213760e8f70 SHA-256: 8537aba2a248c944d0ea14a0f52499360ae1d0d2c0d75fa4e91acc9bf7c54359
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains an embedded URL pointing to 'ponafet.ru', which is likely part of the attack chain. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ponafet.ru/strik?utm_term=fluval+fx6+for+sale+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443372/normal_6027373da0c02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_603368110c675.pdfIn PDF document text
    • http://giocodigital.website/schwinn_430_elliptical_trainer_manuald05cn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454436/normal_6008cb6b8584d.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/e6bd9a5326eeb.pdfIn PDF document text
    • https://jiludagurifo.weebly.com/uploads/1/3/4/3/134349737/5322512.pdfIn PDF document text
    • https://disepijov.weebly.com/uploads/1/3/1/4/131438002/faxunavoloxoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_60281db11f8b5.pdfIn PDF document text
    • https://tugofemupufere.weebly.com/uploads/1/3/4/5/134584107/4215774.pdfIn PDF document text
    • https://mazazujusuvazix.weebly.com/uploads/1/3/1/8/131856432/7443074.pdfIn PDF document text
    • https://katodelof.weebly.com/uploads/1/3/6/0/136051175/zaburamunemola.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fukasutatota.rf.gd/baguwarupetuvota.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/nuvixekipef.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/technical_charts_software_free.pdfIn PDF document text
    • http://wazubumuxige.rf.gd/beetalk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/cargo_manifest_template_free.pdfIn PDF document text
    • http://fedokow.rf.gd/kewimo.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/material_button_ripple_color_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/sedimoworovej.pdfIn PDF document text
    • http://wuwuxatedi.epizy.com/57757179966.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_off0000d40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40B 5252 bytes
SHA-256: a425bbe0716f98e90bfe28583e41bd7845cbcba7cc35e6aaf243ef56c4d885c9
font_01_sfnt_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 11484 bytes
SHA-256: ecc742ada3c5667039686dc0a4fa9d08b11799c61401a2b8515821a86ccdc523

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