Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c29e50331bda51…

MALICIOUS

PDF

51.4 KB Created: 2020-10-30 01:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 019f281fd6a623ee229843903fd3da14 SHA-1: 42e3469c205f5df14cbe271381e7ab72da1c7b78 SHA-256: 32c29e50331bda513347c28f7e7093c54ea31c882930a56555cf2462afb3960a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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=a+concise+guide+to+macroeconomics+pdf In PDF document text
    • https://kijatuvoriwoze.weebly.com/uploads/1/3/4/3/134352029/32c85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382004/normal_5f8b5b1c99fba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f871fbe2f67c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_5f9b4626818b7.pdfIn PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/fca59e7d.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/2f86ae91-bd60-43c4-81fd-706e55130756/76533405461.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/barbie_in_the_pink_shoes_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/rios_de_agua_viva_pomona_ca.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/fnaf_2_animatronics_behavior.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70d734e8-0431-440a-820b-6934fe942d70/97827087780.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/73050540201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8049/9879/files/30430879347.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7164 5432 bytes
SHA-256: 17576a7be8050ee37ae29802b79ae0698d29f5f39b6c5caf359887cdab2c24c7
font_01_sfnt_off000083c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C8 11576 bytes
SHA-256: cbd580dd13b1f5da02f0d526e4f677f8588e838abeaf1cdee117ae4be4df391d
font_02_sfnt_off0000ab78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB78 16060 bytes
SHA-256: 5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330

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