Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9326edb8eca698f…

MALICIOUS

PDF

76.7 KB Created: 2020-12-25 09:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 981ca8475fcea125b445c0c66c2ec493 SHA-1: 9e1cad6b952e054773f4bd8081fbe11009c5460a SHA-256: c9326edb8eca698f4b8df1e06cb08382e94a4d145d3dd587369c766be19dc79b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with a significant number pointing to potentially malicious domains. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to distribute content or redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/strik?utm_term=sputnik+movie+trailer PDF link annotation
    • https://rugisuvo.weebly.com/uploads/1/3/4/4/134438002/6465252.pdfIn PDF document text
    • https://cdn.sqhk.co/liwewajawab/o3ibphd/petrol_star_picket_driver_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/lisesemafo/Dijw8hh/metal_bottle_tree_stand.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/82719446216.pdfIn PDF document text
    • https://s3.amazonaws.com/pukasojalu/95592429314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76c8b251-bf9d-4898-ba46-0a975ec4461b/triangular_prism_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9013077a-0fb8-4360-991b-ade1ae56abd2/biomedical_technology_class.pdfIn PDF document text
    • https://s3.amazonaws.com/buponuwebi/gunanezaxekime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56112642-7a8c-451e-b6fc-7cbbf18a93b9/12856192009.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/gekalefo.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/nalew.pdfIn PDF document text
    • https://s3.amazonaws.com/jofunozuzof/dowiju.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/thomas_calculus_3.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/gdpr_employee_reference_consent_form_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10E 4896 bytes
SHA-256: 6ae3071ac3f4162dded8e40deef44020a1f5b75c33c6147263d1f27ffe18bf81
font_01_sfnt_off0000f198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF198 11168 bytes
SHA-256: b7f59dbfbc52ad3b0f6e4ff0c05cb2d574289047bab56821dfa887d257522a47
font_02_sfnt_off00011796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11796 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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