Malicious PDF — malware analysis report

Static analysis result for SHA-256 870880526c322a95…

MALICIOUS

PDF

62.6 KB Created: 2020-12-25 09:25:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 3413191f39cb5cf03c401df6d7c6d562 SHA-1: 76ccd7b8a2ad7ac14942d1f97378258584f08a61 SHA-256: 870880526c322a959324e8b58c95fb8138ecdbe8bf2e9009af0594fb6bb2ccc5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to disposable domains hosted on Weebly, suggesting a phishing or malware distribution campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a link farm on disposable hosting, further supporting this assessment. No scripts were extracted, but the presence of multiple external URLs is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://trafftec.ru/strik?utm_term=icreate+pony+maker PDF link annotation
    • https://sajijudid.weebly.com/uploads/1/3/5/3/135393685/4676648.pdfIn PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/3596a92f17.pdfIn PDF document text
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/mapagov-rovenolo-wodifofog-lonak.pdfIn PDF document text
    • https://relupopakamon.weebly.com/uploads/1/3/4/4/134455445/e3d86d8b80b.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/zatuzusesasola-nusigu-dewozukafiben.pdfIn PDF document text
    • https://tuxinotem.weebly.com/uploads/1/3/4/8/134883911/29eda53e17d0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451212/normal_5fc32c9d7731e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5fe5748229909.pdfIn PDF document text
    • https://gituruledutaza.weebly.com/uploads/1/3/4/4/134401886/lamaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486758/normal_5fb2bc9b3a65d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453329/normal_5fba78307cc03.pdfIn PDF document text
    • https://sojasokavipives.weebly.com/uploads/1/3/4/6/134677313/gumesijewegavubados.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/blog_templates_wordpress_free.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_off0000b7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FB 4972 bytes
SHA-256: cb2295785a0778cf54bc4c40ce8c0cfc656a1cae985a3414865a63f52e8af01a
font_01_sfnt_off0000c8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8DE 10792 bytes
SHA-256: 211abc4cd79586f0bb6b65e8293ce819e6a196d800fb2bf80b0fa1cb7b83079a

Open this report in the interactive analyzer, or submit your own file for analysis.