Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec6f0a34c5bab2c…

MALICIOUS

PDF

66.9 KB Created: 2020-11-23 07:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 72d5baac9a1b4282a54dad4935e95628 SHA-1: 95f3d89922f22915a24368b082b96642b6855e84 SHA-256: eec6f0a34c5bab2c55e23214498a994181593d82d1be0a2e33d5a189773921a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, with one prominent URL pointing to 'traffking.ru', suggesting a link farm or phishing operation. Although no scripts were explicitly extracted, the PDF structure and the presence of numerous external links are indicative of a malicious document designed to redirect users to potentially harmful websites.

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://traffking.ru/123?utm_term=adding+scientific+notation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373757/normal_5f8c75f85aa3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f8a224d1d508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475570/normal_5fa7f13d93168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374540/normal_5fae7c2bef93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446168/normal_5fa1985935290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402720/normal_5f90cb6faeb37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376375/normal_5f9376dad24d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5fa28bbbbf891.pdfIn PDF document text
    • https://benerema.weebly.com/uploads/1/3/1/4/131408328/7176848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379982/normal_5f8d734b40a9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5fb73ec60fc75.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/muxozuvalubi/75518278270.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A3 5052 bytes
SHA-256: 4b8e6fae00d11d0cc58ca7740aa43c57815376e68991af5e8c1446e782503764
font_01_sfnt_off0000d9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F7 10796 bytes
SHA-256: 104322eb8d560329b3328b0ab25052a51226b3154b8100ecee20de64a412ba3b

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