Malicious PDF — malware analysis report

Static analysis result for SHA-256 968bb35b07874927…

MALICIOUS

PDF

75.2 KB Created: 2021-01-01 08:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1a542a8c9a2265e6c7bc8cdb1bad4465 SHA-1: 44e800c2a157bf68fd191f09daae0c9ec8bb75a3 SHA-256: 968bb35b0787492745ae0e861d05abe4105520508728d8db069a012f0fe446fe
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is designed to lead users to phishing or malware sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely part of a phishing campaign, potentially impersonating a popular online store to trick users into clicking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/strik?utm_term=amazon+kindle+store+apple In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f8d1a8c9037e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f89d5c6bf850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5fa2152b9f7ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5feb517713a1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401712/normal_5f9965d047064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480408/normal_5fb5a78a0eae2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386084/normal_5fb46d5bc814b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389366/normal_5fdf7ed32f3eb.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/a6348e03-ffc6-4ac8-9fd7-0322399e8edf/infinite_sum_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75ae7b93-984f-475e-9eca-384e4dc2b871/sepeva.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/bcece_le_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6eb5c64-d139-42ac-8ed6-ae6c8cbeb5cb/kusomaguvud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a2af037-ec58-4d6b-af3e-bf87c8c2fd1b/chick_fil_a_donation_request_san_antonio.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/zasudifasujowuxivo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41e7505-2101-49fe-8c5e-86c4b36d174a/20332014569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6809da5-61e0-47b1-b39b-12577981ba3e/wizodur.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_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 5208 bytes
SHA-256: c610609cae26bfe5052546fe7207f5cd82fb3ff05d861b21c23529b9aafdc07a
font_01_sfnt_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 10504 bytes
SHA-256: fe48b3dab7957b1625413550101354993f008bc150e1b4e8049e33a55e4568e8

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