Malicious PDF — malware analysis report

Static analysis result for SHA-256 01268b3b12a77531…

MALICIOUS

PDF

71.1 KB Created: 2020-11-24 02:43:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e085f79e3b2b8d7f8c334651b3daa8b SHA-1: 13dd5800999c42f103636c3b04df814d1ebfc37a SHA-256: 01268b3b12a775316b31c5af5905c24072278707daf7008c1b56a2cd9e5514f0
214 Risk Score

Malware Insights

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

This PDF file exhibits malicious characteristics, including a high number of embedded links to external PDFs, with one link pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO manipulation. No scripts were extracted, but the presence of numerous external links suggests an attempt to lead users to malicious content or compromise search engine rankings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ggtraff.ru/strik?utm_term=tracto+espinotalamico+lateral
    • https://cdn-cms.f-static.net/uploads/4445320/normal_5fbc166fe0f7b.pdf
    • https://bavejojonosepes.weebly.com/uploads/1/3/1/3/131380601/mejemitobikusav.pdf
    • https://cdn-cms.f-static.net/uploads/4408176/normal_5faa780e55b59.pdf
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f8bcef932187.pdf
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f8c79de4817f.pdf
    • https://cdn-cms.f-static.net/uploads/4385030/normal_5f9ab4faae7c6.pdf
    • https://fetozoweriwoj.weebly.com/uploads/1/3/4/6/134631739/7333985.pdf
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fa8cc8cafa82.pdf
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f9d3d259759c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gezetega/72747914208.pdf
    • https://s3.amazonaws.com/tedowafomaru/leguwaxavolumuvexilibisid.pdf
    • https://uploads.strikinglycdn.com/files/df9a54ed-f3ac-4c84-b7a9-efcb8e0a121d/diferencia_entre_habilidades_y_compe.pdf
    • https://s3.amazonaws.com/wilugugo/fivitaxekovobudevize.pdf
    • https://uploads.strikinglycdn.com/files/09480d47-8cdd-4fde-940d-580e45cb9269/faribupirokujomamimipu.pdf
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d99b.bin
ebe5828177a6a601b6c4b132c6983624867a929575d92bc34c93630c6ab6bfff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 5028 bytes
font_01_sfnt_off0000ea98.bin
424c2c55577b9956d7e75d733ce19c95ec34a1414189f45a4c241631598b2742		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA98 10776 bytes

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