Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a7f96d7339b2e30…

MALICIOUS

PDF

70.8 KB Created: 2020-11-17 00:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 25afa611cfe31450d167b14db7c98045 SHA-1: 191e83629b057d242e28d7ca524027581dfd22ae SHA-256: 1a7f96d7339b2e30ded548a11cf3476010055cf098efff8aee169f178541603b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/strik?utm_term=logik+washing+machine+liw814w15+manu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375908/normal_5f8ba1b2c2431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379053/normal_5f97ed8c50b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_5fa6526b7fe48.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/c423dba5-9962-42ff-ab22-cf191c6e61e6/16715574490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3976ed-5c0a-44a1-bcac-7d1dcaa26025/gedexarakosuzaxige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35eefb42-dc07-42e5-91dd-444ca037f6d3/ratuwefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8824d7e1-d953-48a2-9d13-4109f8c0853c/calculus_one_and_several_variables_p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089c585b-8025-48cf-835a-d0965d77fedc/79202840676.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/3_foot_ninja_unblocked_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10ada29-42a5-4bf8-a498-7b08cec64d6c/kefisiwudilijovejuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b735238a-256a-4b8c-82ba-92dd0b7be08d/18805455122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3df700af-7dce-469f-bc49-38af35244d32/79391728385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1246bede-894a-420d-acde-7eeebc57ffa2/legal_billable_hours_template.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_off0000d57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57B 5672 bytes
SHA-256: d1159bddff1e2f22d6fb327c8955ea207aad76c9f14cf373d31b9b72ebce63d4
font_01_sfnt_off0000e8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D9 10968 bytes
SHA-256: 421132542a8444db265668c1a819ffb17d8e03d039f2d395a870b6d41f5a2024

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