Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad8755d34b84216b…

MALICIOUS

PDF

67.9 KB Created: 2020-11-12 22:44:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e3686790858d26babff72e19ab03c358 SHA-1: 67dd6490f33b53e362687761fdb7d0d3a7a676f2 SHA-256: ad8755d34b84216b27af79e21b7f866bdd2de3b726766e16479bbba897be92ce
96 Risk Score

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 embeds external URLs that direct users to attacker-controlled resources. 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
  • 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://traffnew.ru/strik?utm_term=lg+ultrawide+monitor+34uc89g PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5f9da4db8fdc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393755/normal_5f9a23d17f800.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_5fad38f47bce4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_5f9876b8361c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456420/normal_5fa58b2a846b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411935/normal_5f93c74153534.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/a8ac3a7b-49a5-4c90-9f66-5313eee319f2/lemosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c1b676b-c836-4c44-ac8e-f661e5c8ab4f/ccna_lab_manual_200-125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cb072ca-fe94-4321-a51d-7783da86e5c7/35269991057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e85ea3c9-f8bb-4aaf-9a65-8fe22e064747/libros_de_ingenieria_economica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31a22c1-f16a-45e2-bd34-cb327cb9d275/tomubilizodulinagigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c19294bd-fed2-484e-adc8-0da91198ff9f/10945993311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44fd3738-af69-4055-8e0f-8e9eb230eb8e/narenupagudavira.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/dungeon_master_adventures.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_off0000c8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FC 5716 bytes
SHA-256: b129401b2879714cc8b264aa2352447c5b4947b9deb55fd38e43354ee0871e43
font_01_sfnt_off0000dc75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC75 11684 bytes
SHA-256: 0c14580f961b89168ce742efadc6521474b5fdca9f83bbe21f4ae638067dbcab