Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e96d3251b180a4e…

MALICIOUS

PDF

65.9 KB Created: 2020-11-20 12:48:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 470856a69241bbdc9a647ca9ff100a22 SHA-1: 27f26b98d0242bc1108f32e315d3db95209f9cfe SHA-256: 4e96d3251b180a4e1bc3a7b1012d3179c6519f87c61da434bbec8c6bab2f1254
214 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/123?utm_term=superman+vs+thanos+who+would+win'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including 'https://s3.amazonaws.com/zikeko/fuvugovamesupa.pdf'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

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://gettraff.ru/123?utm_term=superman+vs+thanos+who+would+win In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f8a3d76710e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482858/normal_5fb5111f3532b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369926/normal_5fa4bb235f46c.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/7007845.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/zikeko/fuvugovamesupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98e54cd-c346-4008-9c47-2e88d99a47ff/iso_14001_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/zerawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d97f6866-bff2-4c73-8f51-d54717e99015/28917140504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf37fb28-5800-4b9b-a01b-7ca70aeed9dd/67255207415.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/kegobalozuzelegeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc8d46c-7162-476f-8456-b99cd8bf8fc0/76852958701.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/key_signatures_chart_bass_and_treble_clef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/084cac6a-9125-4ce8-9fea-0dac46c6a0b9/35183182627.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_off0000c672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC672 5456 bytes
SHA-256: 88a0036bf28fce24140903376bba3c3d15241a17514512b2327fae6faed0665b
font_01_sfnt_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 10016 bytes
SHA-256: af8e929d244c38dab6fd1c14f9b91d9ae5d53f2f02a20e312d4e7f81a69e002b

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