Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cdec68ecf5aa18a…

MALICIOUS

PDF

73.7 KB Created: 2020-12-13 15:54:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cf85d1c21bb7ff5a09fd3b6499377ae6 SHA-1: bf562eb2f2fa6fea9fdd4eda80565e16aa5c4d32 SHA-256: 3cdec68ecf5aa18a97fb74607a4014c3d62f5dd610f9518938aac1e51697dd1c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a site likely used for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent. The presence of embedded links and the overall structure suggest this document is part of a link farm or SEO manipulation scheme to drive traffic to malicious sites.

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 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.
  • 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://traffnew.ru/strik?utm_term=go+pro+eric+worre+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377371/normal_5f8e43979926a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f982305025f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_5fb8afc3d0b38.pdfIn PDF document text
    • https://juxetume.weebly.com/uploads/1/3/4/8/134879156/kadomagizarot-sadasabalup-zetifawudobi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499942/normal_5fcb48d776cba.pdfIn PDF document text
    • https://jasuxazej.weebly.com/uploads/1/3/4/8/134875243/cbeb68e0ef2.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/ab8b08e3-232d-417b-9d51-41ece5ceb8ce/new_jersey_backpages.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d9eb71-fea2-446b-924e-3174dbbc8b5b/snowmobile_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a404f8-53fa-453b-a756-652ead32afdf/57512805297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d0d9d64-c8f9-432a-8ac9-fb5fa9f183df/73126243104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e1e0659-9b72-4875-906b-0853437893f1/doguliropojetumogajaparit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9087e01-3884-45d1-abd0-f5ced7d50154/wiliduvorokuvexifeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad25461f-75cc-4d1f-93b9-d6a4ea056809/ormrod_educational_psychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ac81c8-0916-4d86-a307-8fe46c3f3d2f/zagif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e41a12-09f1-4e89-bfb3-4edc3ed72e7c/72102667466.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_off0000e213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE213 5272 bytes
SHA-256: 4bedfedb13c61243ca7a9c383f7ef566311e9edb44642769d9d1665c3825872e
font_01_sfnt_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 11104 bytes
SHA-256: 36a5292c0fc945b5204ba023b0a6da2c1bb27b2c4605ff1264b1992568d93eda

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