Malicious PDF — malware analysis report

Static analysis result for SHA-256 1025c5ce314ec283…

MALICIOUS

PDF

101.7 KB Created: 2020-11-17 05:25:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 506a0237909c05ee8db842d9bf1e9e0b SHA-1: b564f63298bbb1c6fad2addc232dd7e6f6893cf2 SHA-256: 1025c5ce314ec28362fe0eb5507c964555858630b2a7c8700f37b44ef61a1f6a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on Weebly, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/123?utm_term=peliculas+en+espanol+en+amazon PDF link annotation
    • https://nulosogitizibe.weebly.com/uploads/1/3/4/3/134317173/8587814.pdfIn PDF document text
    • https://zewuxufasebi.weebly.com/uploads/1/3/4/3/134320084/6026459d8.pdfIn PDF document text
    • https://zufugorutamivas.weebly.com/uploads/1/3/4/4/134401118/nomebovi.pdfIn PDF document text
    • https://ripilebaxozeduv.weebly.com/uploads/1/3/4/2/134266308/3f36f7329724c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383467/normal_5f8c7fff5439e.pdfIn PDF document text
    • https://xijiruxexewige.weebly.com/uploads/1/3/4/7/134725886/6077ea6327e1.pdfIn PDF document text
    • https://kozezivu.weebly.com/uploads/1/3/4/4/134444222/12b890294fcaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/f11c677e-60ee-4b18-93dc-0c606b2d79a1/36939252014.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/wofoxamopavelumejalolap.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/yrel_hots_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/putasudukivixopewe.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/japaxukujilibokuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A7 4836 bytes
SHA-256: 8f4455f10ad6bcadf252d3bd5d19ca71e945cfdc76d38de78bcb28ff39c2b27a
font_01_sfnt_off000153f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153F6 11872 bytes
SHA-256: 36cf7ab1616059509a467b190aca3d2031a02515a8a233f1ed9e6e3177260f74
font_02_sfnt_off00017aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AA1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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