Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe4c02d15a747bb…

MALICIOUS

PDF

61.3 KB Created: 2020-11-13 17:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: db0f38feeea4c5068032566956874084 SHA-1: 1ced8d35628c68cf29c34b18f84b5db5f3b202fd SHA-256: cbe4c02d15a747bbfe88655f90282d84c2a7bd1a7f4920559bd280a5a3537399
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a link farm. One of the primary external URIs, 'https://traffset.ru/strik?utm_term=appavum+veenjum+2015', is a strong indicator of malicious intent, likely leading to a phishing or malware distribution site. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=appavum+veenjum+2015 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387567/normal_5f9673340a46c.pdfIn PDF document text
    • https://xuxuroxipekawip.weebly.com/uploads/1/3/4/2/134265976/7119399.pdfIn PDF document text
    • https://wafulerafi.weebly.com/uploads/1/3/4/5/134503758/5071919.pdfIn PDF document text
    • https://sebonegipuwi.weebly.com/uploads/1/3/4/1/134108682/pimuzoxolos.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/fasanag/bloomberg_barclays_indices.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/sepow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80dd4e5-8fc0-4321-95e5-028766cec77c/lessons_in_classical_drawing_dow.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/tekurerizexanaguxokako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ee0de1-7955-4ead-92c2-6a1cd511d356/potaxoj.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/wixopekoresame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6031e158-4c97-47f6-bb42-70361e816827/27383910336.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/47493612594.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/fishers_landing_walgreens.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3de92005-50e0-431c-918a-c18ac68e0c5f/panamax_m5300-pm_manual.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_off0000b0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D7 5232 bytes
SHA-256: 81b31b0ea23421cf0567b87be4653ed2c0e551e926500786407efb207cb898d5
font_01_sfnt_off0000c2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2AC 10664 bytes
SHA-256: 3f5355015d6fac0d9935ffde4fa948a5577d8bc6e7dfa95cfe45978a7ae76712

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