Malicious PDF — malware analysis report

Static analysis result for SHA-256 9003496a3d1dba46…

MALICIOUS

PDF

58.9 KB Created: 2020-12-19 13:17:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: b27d8bcfaf9ffae9ae448b19d931bd74 SHA-1: 5a12965bfb8aa1c74e4127bb14f32243daeac373 SHA-256: 9003496a3d1dba4664558571aafd7a8065716e871790d6b04b0f3ee1f49b568b
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a significant number of embedded links, many pointing to potentially malicious redirector infrastructure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate an attempt to direct users to harmful websites. The ML classifier also flagged this PDF with high confidence, supporting the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/aws?utm_term=sweatcoin+premium+apk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4403271/normal_5fc6dd1c6d7d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5fd8d1cfe29b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381546/normal_5fc4a84cce80e.pdfIn PDF document text
    • https://sixexarujizevav.weebly.com/uploads/1/3/4/5/134584368/netegovujivojup.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/gaxifikazefedumagobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_5fa9abe390c75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375197/normal_5f9bdc1b2c0ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411926/normal_5fd3267eeed44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fd0f0870d748.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/fbec1773-c3e0-4c9b-9604-963e424de656/89527939285.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/3d_map_of_india.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc39d206b97992eb56cd759/t/5fc4797d3485235c8655b3fd/1606711678487/98009462693.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/all_songs_of_kabir_singh_pagalworld.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_off0000ae9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9E 5128 bytes
SHA-256: 3bd287ce63222fd3652c10c6277059ee928c3d2eed3d19b73d41b8a5b0ad3dbd
font_01_sfnt_off0000c00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00F 8960 bytes
SHA-256: 10ddcd67e8f4d21c876b66fcbbebe7eecd57b5c3139cd3b340dc45e432466e2f

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