Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb713b38bffdf9e8…

MALICIOUS

PDF

78.2 KB Created: 2020-11-23 21:34:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: d1b33e01658bec7872e16a0753822631 SHA-1: e13781b77e821d47e54d3ee90f1991222a88bacc SHA-256: eb713b38bffdf9e80f28c4d77759ca12d1c1ce6bd529cb940f1913b847bbb32a
156 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 external links, many of which are to PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=art+history+volume+2+marilyn+stokstad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373986/normal_5f8a5357d8b1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5f8bb66672944.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491670/normal_5fae1c1f57267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391954/normal_5fa99f93be9b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5f992402b6779.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_5f9a3cc9b262e.pdfIn PDF document text
    • https://ligexomapaku.weebly.com/uploads/1/3/4/3/134321337/476c4360dbe607.pdfIn PDF document text
    • https://gebiworopefibo.weebly.com/uploads/1/3/4/5/134583098/xojeme.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/7b7a148d-a63a-4e49-8d8c-1a9f01e6856e/figesokidibimepagubevozi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3808fcf0-8c56-47a2-b0b7-46fcc0d2e703/rebebitusekur.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/manual_lavadora_maytag.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_off0000f492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF492 5412 bytes
SHA-256: 4e07afcc8d23c07f216ee91640a78b257d6a120a6eaa48bc895d468300d803ba
font_01_sfnt_off000106d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D8 10912 bytes
SHA-256: d3758875ee1561952da7742cddc2f9b654a1d3726a844adc240550ed23aa63e8

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