Malicious PDF — malware analysis report

Static analysis result for SHA-256 76f1353972cb1f77…

MALICIOUS

PDF

73.1 KB Created: 2020-11-14 01:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 328eeffa84913d35e87282403c56f406 SHA-1: ddac6d54fc6c676ff1208c130cdd84cc6171cd8b SHA-256: 76f1353972cb1f77faaf848fdbd58ac8339391c7223d875737e322bd37f17f69
222 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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/strik?utm_term=battlefield+bad+company+2+serial+key+error In PDF document text
    • https://zakewurez.weebly.com/uploads/1/3/4/4/134471700/3492568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8e455f7d6fa.pdfIn PDF document text
    • https://lejigatoni.weebly.com/uploads/1/3/1/8/131871980/264472e0013d.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/repetonodiz.pdfIn PDF document text
    • https://lepebixetuvenal.weebly.com/uploads/1/3/4/6/134634058/9e0bd0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426415/normal_5f9c3a9ee5624.pdfIn PDF document text
    • https://bizevino.weebly.com/uploads/1/3/4/3/134320064/7536835.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/lixasifasi/pdf_to_word_free_download_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/byomkesh_bakshi_bengali_movie_720p.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabisura/90357900383.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/geometry_textbook_holt.pdfIn PDF document text
    • https://s3.amazonaws.com/xebareto/mardens_maine_brewer.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_off0000db81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB81 5788 bytes
SHA-256: cf0bf625246e766e3546c3d4b48358e0fffba9b95c930d2c6151c807ea72a194
font_01_sfnt_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 12188 bytes
SHA-256: 85ff49997c1f62e1dfe2bf6861d3dc6daae0187726126f107f5c0dfd59954167

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