Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b693bcbda79ee44…

MALICIOUS

PDF

70.7 KB Created: 2020-12-22 13:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a6a9ec7f331a7a402d00a5d1f1dc89c7 SHA-1: d50f70b37c91e2e965cf9ecaa8e649f8b659d1d4 SHA-256: 3b693bcbda79ee44b952b8f7e888e6b57f8c602225b1f9e669feafbbd3b8227a
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous external links suggests an attempt to lure the user to a compromised or malicious website.

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
  • 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://ggtraff.ru/strik?utm_term=top+hits+love+songs+2000 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422893/normal_5fad8216646c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f9dc1cbe626d.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/889750c936e7cb8.pdfIn PDF document text
    • https://zikenanevo.weebly.com/uploads/1/3/4/5/134589255/3693993.pdfIn PDF document text
    • https://fifevogu.weebly.com/uploads/1/3/4/6/134602809/3841865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366308/normal_5fb6d619e7b20.pdfIn PDF document text
    • https://guvodirafed.weebly.com/uploads/1/3/4/4/134475496/5850595.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5fad9e0ee7609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419650/normal_5fb2a66112e30.pdfIn PDF document text
    • https://jisevudes.weebly.com/uploads/1/3/4/8/134882916/rerivulipok-sovopofa-visobopat-wuvidokix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380086/normal_5fb9edcb75a54.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/e8719bb5-57c0-417f-8946-6e9d35ce9afa/helsreach_40k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28d7220e-86ba-428b-a801-89ac0d37cd74/historia_de_la_geometria.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_off0000d8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C4 5060 bytes
SHA-256: f7d3e2d9ae100621e9eabf6c74b0c8dd5c87640a5144331ff6b63087131a8363
font_01_sfnt_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 10568 bytes
SHA-256: 402f209f9db11ef0737f8cd045548b4e9ce19ad3919ac50d59ab3dcf29a9fe19

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