Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1a7dfe220f2d09…

MALICIOUS

PDF

80.8 KB Created: 2021-01-11 08:15:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0482cba2bc91ce208621b5471feee0c1 SHA-1: cf12de7b3d5b21936304b1e9e639680bbb7d24aa SHA-256: 2c1a7dfe220f2d09afd0aabd24b8e36dd013f3b99c82c79348b92fb7fd3fc0b1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a social engineering attack designed to lead the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=bad+complaints+about+miller+motte+college+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4496374/normal_5fd288f9327fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402261/normal_5fbdc02435ece.pdfIn PDF document text
    • https://site-1168384.mozfiles.com/files/1168384/ben_10_mod_for_gta_san_andreas_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405642/normal_5fdb6041065ae.pdfIn PDF document text
    • https://site-1174394.mozfiles.com/files/1174394/zaguxaxonigokoludelifap.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/gurowozenupifi/29435740788.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/mid_city_campus_continuing_education.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/18007985817.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/tipopex.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/22908774175.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/90175029928.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/kendo_grid_row_template_sort.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/management_accounting_system_definition.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/dead_by_daylight_mobile_apk_pure.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_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 5584 bytes
SHA-256: c7036150ab12dd7235dd13cece25e6b70c66b018466b7e086e4c31fccdaa564e
font_01_sfnt_off0001116c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116C 10640 bytes
SHA-256: ff5f9d3ebeb17b5d2bd3720af96767a2f8ad15c2771708e2449d559497650969

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