Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c79129a19d2d404…

MALICIOUS

PDF

70.3 KB Created: 2020-11-24 07:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 57ef145f775a1ae3ab02c3cdd92ef11f SHA-1: 5b8fd5607b2c8aa256e4633fc747d7a37d822ba8 SHA-256: 8c79129a19d2d4049ed4fdcd08b6fb7561246ed6dcfb5e5acc77e1e88614540e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://cctraff.ru/123?utm_term=usb+to+firewire+adapter+apple In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379614/normal_5f962fda3506b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/novifamigot/air_force_bullets_action_impact_result.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/fetofetunizusigunulobag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8cae251-4448-4ce2-821f-3b6454e3418c/bank_management_and_financial_services_9th_edition_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f15a0ea-d46e-4426-acae-a0482f229526/step_1_study_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/fozuwamurarop.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/lighting_manufacturing_companies_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b69b567-3d0c-4775-bce5-e1ced31f32ca/93890897440.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/vifijutizubizope.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/approval_sheet_dlsu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d87b299-47c2-4a1d-8edf-5e1c70696018/phoenix_wright_justice_for_all_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b67c04c0-6937-4bf8-916f-9235a5445c92/vunaneretumusoliworepif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c08aa9a-a21f-4173-9789-a6d039782989/46038138599.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/walt_disney_world_park_maps_2018.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA73 4940 bytes
SHA-256: b220e381d4d2ebb7a01b068d0b99e8edd97a370bcd80044633f6ba4cf66687a5
font_01_sfnt_off0000db5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5C 10276 bytes
SHA-256: 8054eb0d396256455a8e9d2595c0899cbc0f6c1bd5a84134bba914c1653cc58d
font_02_sfnt_off0000fe91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE91 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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