Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bd51af95e211068…

MALICIOUS

PDF

64.8 KB Created: 2020-12-22 18:41:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: cee9c691376d14b95df5ab191fc8867f SHA-1: c357eacb4351268a82315758d7f59defeda56122 SHA-256: 8bd51af95e211068dcca0f284a816ce4ecd3e251b87f035082962cc714414ddb
214 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 ClamAV and 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 0.9969

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
  • 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://gettraff.ru/strik?utm_term=teppen+ramen+take+out In PDF document text
    • https://cdn-cms.f-static.net/uploads/4482853/normal_5fbd8283d2360.pdfIn PDF document text
    • https://tifunubuxeji.weebly.com/uploads/1/3/4/5/134523212/zusivukunamujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/array_in_c_language_with_example.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/2817846015.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/instruction_manual_for_breville_juicer_je95xl.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/nafid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b0bd006-a4af-4fa2-8ae7-8206c3b59bc4/verasenedudotijelezijun.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/10180848237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099c2970-586e-4bff-8a4e-378aba783822/gukaxuwexo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5CC 4600 bytes
SHA-256: 4ca48e40b48bd853e3e8ed61f9d0e5ec27974b0d85c5b33ea444792975cf38b0
font_01_sfnt_off0000c54c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54C 10376 bytes
SHA-256: c879187a8b9fb04906d7c6818a72e23c7507f8fe95b93fa47e6704773eb2b675
font_02_sfnt_off0000e887.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE887 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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