Malicious PDF — malware analysis report

Static analysis result for SHA-256 66edb31bd7b51645…

MALICIOUS

PDF

58.8 KB Created: 2020-11-25 22:21:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8972f573dd6214dc36e9a2ea7bd625a SHA-1: 84c7cb459c49d83c9dae9b4ddc7348b05617cd8a SHA-256: 66edb31bd7b51645ca49782e88cabba9a94d23ab5a26e62d3492412917809a77
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical ClamAV detection for Pdf.Phishing.Trojan. The embedded URL https://traffmen.ru/strik?utm_term=mossberg+500+magpul is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URLs strongly suggest an attempt to phish or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffmen.ru/strik?utm_term=mossberg+500+magpul In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459776/normal_5fba18031f309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419235/normal_5f9d577fc549a.pdfIn PDF document text
    • https://pudozewo.weebly.com/uploads/1/3/4/3/134311846/a104d2aa9043280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_5f9bf39a26de5.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/nuxulikiwab/9603628101.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/simple_present_negative_form_structure.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/altos_product_price_list_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/rimavolidenujusamodup.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/motebib.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/affirmative_and_negative_sentences_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/97612701853.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/938e0434-1ee0-4409-b8c1-d253cbc756ef/icono_pokemon_go.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_off0000a81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA81C 5552 bytes
SHA-256: 27f677d5096a00ee63ef1ea238edad4fd46649c3df2d0f896d70389ef63b9e41
font_01_sfnt_off0000baf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF1 10548 bytes
SHA-256: f83ce836b742ebf9952875f8d0ada6e6960e42bdea335451a3cfaae09ede5e64

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