Malicious PDF — malware analysis report

Static analysis result for SHA-256 94c6024537ba4edb…

MALICIOUS

PDF

43.8 KB Created: 2020-11-05 19:36:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0228c8eb29aca85918405392b0801ab8 SHA-1: 158d19dd3a574b350148720f18cb41a1d05388c6 SHA-256: 94c6024537ba4edb7a3ee425b414e4de0a59610477f94e5ad4d3486ee1407625
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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?keyword=frigidaire+gas+stove+repairman PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f87bf9aa0ca7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5fa2c055dec67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369486/normal_5f918e02019f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f8d1e363cd2c.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/dupuvikadijuraxere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377647/normal_5f8ec491560fd.pdfIn PDF document text
    • https://zufopawel.weebly.com/uploads/1/3/4/4/134462865/9049292.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/funaku-xakoke-guwaxilozolar-bilovaxodofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f9cda4892d63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bb8413b-8c6d-415e-8c60-9a72870f2e41/37631710472.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/78272050411.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/azure_devops_documentation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140915c0-b1f8-4c28-9a86-9b9d13e1cf7b/55145021846.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_off00006b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 5264 bytes
SHA-256: 8e85e626458d4710e9a45dd74c4e70c1fd91ff47f24ff3411236f1557e63b7d1
font_01_sfnt_off00007d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0E 10772 bytes
SHA-256: 026794f5bf2401efa8da86f04a1f4ca1b2f8f4031940d3e9b050d8c5c4abfa09

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