Malicious PDF — malware analysis report

Static analysis result for SHA-256 806e980621309456…

MALICIOUS

PDF

32.1 KB Created: 2020-10-30 12:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: dc92ec3f548a0c6c7c23f877621e06b8 SHA-1: 902453e41e8a0d92f972cf251523e9abfafd90d4 SHA-256: 806e980621309456b89457ea8c7535094609903eba963e62682a348e52097c23
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/123?keyword=ep1-kp+expression+pedal In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f93a4bd0e000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5f9736a664364.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f8cb552d6f81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8b46114af9d.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/wekupu_kojos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_5f8bc7dbe412d.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/308f030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5f9523ec990e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_5f91c044707b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_5f9b5e01e717a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f908eb75e312.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/385f9dd9-8d8d-41a8-8147-7c411c36c5c9/2401609927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef602e2b-cc4b-4903-a0c4-965212249c86/woman_hollering_creek_and_other_stories_citation.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 4

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_off000041c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41C0 5128 bytes
SHA-256: 4cc9dc55db85625b6ab95f10b6ed7bca5355abe7c7360e1fa9d4e0b3fba549d9
font_01_sfnt_off0000534f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x534F 9516 bytes
SHA-256: 87eba7e4ef5ebd5e9aae4c4ce688373e3e5364cd45d5b375a7f49c7343f4faa6

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