Malicious PDF — malware analysis report

Static analysis result for SHA-256 09fd82c4e85446fa…

MALICIOUS

PDF

38.5 KB Created: 2020-11-04 21:50:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: edf8b07ce2d691ea51793343dd48f875 SHA-1: dfc6a07cad94213476cbb5cc64b233c9a063808a SHA-256: 09fd82c4e85446fab81b20209e5c250d0e3e798e2f7e1fe6c122307f705297d8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple critical heuristics, including a malicious redirector link and a PDF link farm. The embedded document body, though partially corrupted, contains a URL that matches the malicious redirector. The presence of numerous external PDF links suggests an attempt to manipulate search engine results or distribute malicious content through a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=aragon+high+school+bell+schedule In PDF document text
    • https://kuguzozivef.weebly.com/uploads/1/3/0/7/130739994/lagopedobinobobixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5f9b9abc30201.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5f8f447a077dd.pdfIn PDF document text
    • https://jabiratunibi.weebly.com/uploads/1/3/2/6/132683422/5530776.pdfIn PDF document text
    • https://repafajekojila.weebly.com/uploads/1/3/4/3/134305679/kigupoxutujir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f97723dddf37.pdfIn PDF document text
    • https://vuwurata.weebly.com/uploads/1/3/4/4/134481670/janiburopazun.pdfIn PDF document text
    • https://mezuxanivatanid.weebly.com/uploads/1/3/4/4/134499991/sakor.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/a6f259b0-ba8a-43e5-8b03-500d0a7d9ce9/lesexigojisimaxurotefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0639f95-b505-469e-a03d-97464ac69527/chestnut_hill_academy_philadelphia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c46b069e-1de5-4b53-a36e-630fac55f52c/firapafokitazul.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_off000056e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56E4 5328 bytes
SHA-256: 59ba9cea7efe6991d3dda183d5dea8c5db2ae5b2e76d4b06996d76fb1234146d
font_01_sfnt_off000068fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68FA 11332 bytes
SHA-256: f15cbf6ef1659ad98c7fff22696b84b00ce9ad43031a09297ed03338ee981b2a

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