Malicious PDF — malware analysis report

Static analysis result for SHA-256 2769df47e2b3aa5a…

MALICIOUS

PDF

66.8 KB Created: 2020-11-19 21:56:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c50ae8c7a7351d912bbda78dd982b5b7 SHA-1: d5785e6df5743fe3400cd79fdcd6299ceb8e64e8 SHA-256: 2769df47e2b3aa5a0103fe0a9e90013f498aee5346bb97f9cf99cb05fbb077b4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffking.ru/strik?utm_term=pedro+sanchez+paisagista+de+jardins'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=pedro+sanchez+paisagista+de+jardins In PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5fa4162b6000d.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/fosawef/one_step_inequalities_worksheet_6th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ecc2fbb-1872-47a4-87af-6981346a18a4/fitbit_one_charger_argos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d310c270-7c76-4a5e-9883-b8923ac4b9da/mixuluk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b9a3c1-27d0-48d1-8e9e-da12a3e770ef/24212882376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afaadfc8-c53e-4222-b46c-dd5c5d7b27d5/49230301763.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/gumezugujijuno.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/vusewiramas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f912f10e-03a0-4fe7-a683-b13422938fd7/zuroxigovizajimidewatatox.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/mevirika.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_off0000c74c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC74C 5432 bytes
SHA-256: d1debd203ed5d352635b269303cb8862d80259e800f7ff05a12f3b8dae1318fb
font_01_sfnt_off0000d9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D1 10380 bytes
SHA-256: 628354d5cc7000af6aeb99e3732f49350f65260afa0a2d542d94182f53477cef