Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e6ea182be3662f…

MALICIOUS

PDF

65.1 KB Created: 2020-11-10 14:23:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 887ec24c0a9aedc0ac79147d9c1e6ec5 SHA-1: db4f48f81f5c257bb48b5dc5f3a56af337b3b024 SHA-256: 35e6ea182be3662f74bc8f90090b28204782af14b42a04832b52e40fae58a785
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm with numerous external PDF links, suggesting a phishing or spamming operation. The presence of an embedded URL and the 'Fake invoice / payment lure' heuristic indicate the document's content is designed to trick the user into clicking a malicious link, likely leading to a phishing site or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://trafficel.ru/123?keyword=truckersedge+load+board+login PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385020/normal_5fa3e52f8daec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_5fa4beb2bd794.pdfIn PDF document text
    • https://jugurapofan.weebly.com/uploads/1/3/4/3/134339640/dufexonozakesoziz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f9056d734d20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_5f9794bcd7b24.pdfIn PDF document text
    • https://zamelati.weebly.com/uploads/1/3/4/6/134652334/vupije_pumoxivozu_fisez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421350/normal_5faa848a9396f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_5f9e126082a6a.pdfIn PDF document text
    • https://jebowevut.weebly.com/uploads/1/3/4/4/134493782/jirifoluko-nisukowogerufe-lupid-mewovewixini.pdfIn PDF document text
    • https://rukazoxet.weebly.com/uploads/1/3/4/0/134040508/5703321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368991/normal_5f9354fd756e5.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/wiwuxot/kulizepososalolosegobox.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/administrao_geral_e_pblica_para_concursos_download.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_off0000bfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD5 5260 bytes
SHA-256: ecd570bc4b29957ad182005b0a99b9e35e78f18f35384cdd669733a4c26a3596
font_01_sfnt_off0000d1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C8 11296 bytes
SHA-256: 3bb195b356ab96dcb3ef0161c98083ed72263cf2795340df0c1cdaac796e1f73

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