Malicious PDF — malware analysis report

Static analysis result for SHA-256 45a2e92299bdd12b…

MALICIOUS

PDF

60.1 KB Created: 2020-11-27 06:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7cb05f60572786b3574ae8ac88266f46 SHA-1: bb926ffaabf105355a3d0726e9800a15c474cbae SHA-256: 45a2e92299bdd12bdec36945b9e4a8f8ca3d6c3b7930729b4ddca35d736c5fa2
214 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 links, including one pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to 'Windows office activator reddit'. The presence of a link farm and a malicious redirector indicates an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

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
  • 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.
  • 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://traffmen.ru/strik?utm_term=windows+office+activator+reddit In PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/luvuvosavukize_seganop_nugifurol_bivade.pdfIn PDF document text
    • https://vexebosarewasu.weebly.com/uploads/1/3/4/6/134699383/lufubomebafege_sufalijelenif_tidase_mavivuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472783/normal_5fb2762ee80b5.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/8260080.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b2b7d24-53bc-427b-b4a8-32f3070337af/audi_a4_b6_1.9_tdi_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/vepuradejakalaluvolafajen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de58d5ba-6a8d-489e-8bee-1e5e8b9aaa2f/wifevajunurubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b817f126-1798-4aee-93fc-0e9e954f8e55/fuvewovaxukuvexobesopivel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43e88863-a9f7-4bd3-b435-e695c2345c51/pacific_standard_kuruma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1ff9897-5799-45b3-9ae1-1f975cf12ed8/31329069207.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/zogudi.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/add_electronic_signature_to_excel_spreadsheet.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_off0000af92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF92 5148 bytes
SHA-256: 7151e0154d7b1d6b7a59c67be75e831f411ec6f10ee09a14a357388cd7d7e708
font_01_sfnt_off0000c142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC142 10164 bytes
SHA-256: 4ff9925eb69bab329c3388029dc1e63f45955ab5143152289453a61d081d907f

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