Malicious PDF — malware analysis report

Static analysis result for SHA-256 df972e896157aa03…

MALICIOUS

PDF

64.8 KB Created: 2020-12-20 14:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 8a87f24604d41087188b6a25265ec9b5 SHA-1: 78bf61c1bb2f36a75d83da2bbedebfd2e95ca328 SHA-256: df972e896157aa03d5b61f76c008fff9ca3e7676289edbb102ecca2bd877667c
164 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on file-sharing services, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded URLs and a 'download button' heuristic further supports a lure-based attack pattern, likely leading to a phishing site or 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?utm_term=what+was+the+bronx+slave+market PDF link annotation
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/9125866.pdfIn PDF document text
    • https://miniroworopan.weebly.com/uploads/1/3/4/4/134444940/9453627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5fc187fe7beee.pdfIn PDF document text
    • https://mijelowiwiloz.weebly.com/uploads/1/3/1/1/131163856/1b1cc4a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5fa39ee342c8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420244/normal_5fa6901d13f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413843/normal_5fa094600c032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388839/normal_5fa1dcee85089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394062/normal_5fa4392a8b9d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420748/normal_5f9b7563be163.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/7ae73f028d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc583aebf71053ccb2ee7e6/t/5fc8b094dcb5b2607981a8bf/1606987924845/angry_birds_2_tips.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc1f223fa04221c71651802/1606545956081/lapemutiz.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_off0000c451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC451 5360 bytes
SHA-256: d595f1e409a5d0427546459b93d6a4a8f6dfa258c35be009e9d75a1c76e3b4f6
font_01_sfnt_off0000d67a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67A 9356 bytes
SHA-256: 8c60176abe7dc94f983338085b457080fb9546b79d40684fd57a6498f4f2d8b3

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