Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2edf5384e3d9b6…

MALICIOUS

PDF

37.3 KB Created: 2020-10-28 10:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 7adc63ca561afc2a651375d029b65dc2 SHA-1: 2b461cdb476c3354d0c10abbac7de578da124eaa SHA-256: 7b2edf5384e3d9b6fedd14539427d36eab3837b114aab4574e6cf4d624c1ec10
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a malicious redirector link disguised as a driver download. The ML classifier and heuristic firings strongly indicate malicious intent. The embedded URLs likely lead to further stages of the attack, such as downloading additional malware or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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://cctraff.ru/strik?keyword=m5a99fx+pro+r2.0+drivers In PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/8d7d7947.pdfIn PDF document text
    • https://wixurawitubeza.weebly.com/uploads/1/3/4/3/134319602/nagozepizosu-zulibij-zisokepudeg-vafepi.pdfIn PDF document text
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/1ba468a856034.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413563/normal_5f979399eb8a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366408/normal_5f8bfe371aef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375210/normal_5f9204bae6ca4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390999/normal_5f939cae7fa9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413007/normal_5f93a34474f52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f95ff4b38b22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369775/normal_5f96005938040.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/5afcec1b-7670-4980-9c18-0a940394d13e/bazeson.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19dac87-703e-4f43-82f6-b41ff86fb7c9/85810113135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a1cc2d9-3a86-43d6-8b2d-a3a5dc57bfff/ligokavanojoxibimifokif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5d6b2ee-a9aa-466d-a914-8f7f1535da3c/kebebelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae959db-5565-4954-a1e0-a4639431af6f/29372696112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/918306bc-159a-486d-a42a-6bd23061b438/63363057217.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_off00005224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5224 5720 bytes
SHA-256: 653e14afb58ab11dd1192e028074d59756a5f4d1dd9814ff4b3a6da582cb6df4
font_01_sfnt_off000065c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C9 10088 bytes
SHA-256: d5487f6d63ffbf6510ff92fd08d32deab6116284c29188a5f5c0ca632f375692

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