Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e76a533f3ff5b73…

MALICIOUS

PDF

65.2 KB Created: 2020-11-24 05:14:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bd2409c2d32958d390215c8c9686a5eb SHA-1: ca889e1b0d9bddb0e8c84cbc0125d10f73e9be24 SHA-256: 1e76a533f3ff5b7317dfd6150fe53c7f2fc10331a7865a3d3e573bcd475b9958
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs, such as 'https://trafftec.ru/strik?utm_term=fallout+1+official+strategy+guide+pdf', likely lead to malicious content or phishing sites. No scripts were extracted, but the PDF structure and numerous external links point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=fallout+1+official+strategy+guide+pdf PDF link annotation
    • https://zufojemesegogof.weebly.com/uploads/1/3/4/7/134753559/ginabulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413454/normal_5fa119205c663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450506/normal_5faa23c3f31c5.pdfIn PDF document text
    • https://vilemanunopabom.weebly.com/uploads/1/3/4/3/134317174/dc218c23.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/vevapimama.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367303/normal_5f8863843cdf2.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/lanaxutodi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402936/normal_5f9763a93d3d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415946/normal_5fae634b4ef5c.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/fosagobomap/sevir.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/hadestown_sheet_music_epic_iii.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_off0000c3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 5432 bytes
SHA-256: 76799b0a543527e1d04a489699c08773de874d65c0f95e22d918163d538f3521
font_01_sfnt_off0000d682.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD682 9932 bytes
SHA-256: b159633c7496885be46cd5683d287e72a731f06c9a2f54964f428b293db771a1

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