Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c76b5da2eaef861…

MALICIOUS

PDF

75.0 KB Created: 2021-04-07 09:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a5e3704beb5e9c3f49b293034e3433d SHA-1: c135124bce532808418edde7b0b747ad291111cc SHA-256: 8c76b5da2eaef8618a23e3cacafc2be117e8c541c804875ea73f7b61e5efcdda
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/strik?utm_term=how+to+call+tree+without+leaves+drawing PDF link annotation
    • https://cdn.sqhk.co/lexijunibul/hehjgdU/respect_for_co_workers_quotes.pdfIn PDF document text
    • https://pinowutofabu.weebly.com/uploads/1/3/4/7/134763632/xenafibejukolowoped.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/pjihdbe/eyelash_glue_business.pdfIn PDF document text
    • https://vomerigovelaj.weebly.com/uploads/1/3/4/9/134901888/nujofojazaxebasukuzo.pdfIn PDF document text
    • http://ponexikid.22web.org/nujogagopusabutuk.pdfIn PDF document text
    • http://sevelorovuwo.66ghz.com/performance_guarantee_insurance_meaning.pdfIn PDF document text
    • https://bogibopedazite.weebly.com/uploads/1/3/4/0/134018154/1654865.pdfIn PDF document text
    • https://kekoweditolig.weebly.com/uploads/1/3/2/6/132683085/6530744.pdfIn PDF document text
    • http://fimokeroda.22web.org/templates_for_resumes_microsoft_word_2007.pdfIn PDF document text
    • http://lowewiziwagek.22web.org/buderus_gb172i.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/5aa1beda876ac.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/xugujutep.pdfIn PDF document text
    • https://cdn.sqhk.co/demexadol/hgcghif/wigigebixokopiwofudukawi.pdfIn PDF document text
    • https://cdn.sqhk.co/vivokunavu/5hjjjSt/98589593736.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/3ic7KUA/tri_fold_brochure_sample.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/863fd6a2-cdb2-46bf-8dcc-8d71adaf388d/red_pyramid_series_order.pdfIn PDF document text
    • http://bexipazo.rf.gd/3039142666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ae022e8-7d97-475e-8b4b-eebd1bb7585c/book_report_ideas_for_gifted_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc00af0-15ae-49aa-90d6-fb43853848c2/24763757692.pdfIn PDF document text
    • http://vowonedof.epizy.com/digital_media_advertising.pdfIn PDF document text
    • http://domapabef.epizy.com/givotibotugeruzuge.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 8

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_off0000e964.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE964 5316 bytes
SHA-256: 8964d5a7205efd3f9fecfb802859aca8f178a582ca5d3563a60e2bf4f86d220a
font_01_sfnt_off0000fb83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB83 10072 bytes
SHA-256: fa2add0fa257d9ac17f69b1c4651c9673407b12f337df9f00cf0565443196c92

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