Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8015597d1a1841…

MALICIOUS

PDF

66.2 KB Created: 2020-11-11 07:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f7d8c6de4b8b3e9d7b056191872acb64 SHA-1: d3eb049c822450b1196b5b53e58365c7b7948aa2 SHA-256: 7c8015597d1a1841aa2752ffd36ceea67bf65b7c99f695318893c8334b4f0e93
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • 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?keyword=lg+model+rc797t+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f8ae600c415f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382958/normal_5f8c75328599e.pdfIn PDF document text
    • https://leputixoted.weebly.com/uploads/1/3/2/6/132683438/wutakaminumu.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/18dca8c0-8292-42e6-b531-2b28b117fff9/80317025021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/411030ea-bddc-410a-b82d-4c12a8dd1b50/57704909415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/809f7a83-579e-4cad-969e-f0884af29345/roblox_id_songs_tik_tok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/504d8c41-f81b-418d-ab70-60c6fd8a5c4e/tres_metros_sobre_el_cielo_pelicula_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6394eae-5235-4a0f-9dd5-6a3dde56ea37/90828758297.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb93aa58-b4de-4df4-a6f2-dfa5b4719e17/kenmore_dishwasher_model_665_troubleshooting.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_off0000c491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC491 5256 bytes
SHA-256: 93bcca3699ebce1e925bb88d2a2bc8d98b4e26d7b0ab8e606a585c298aa97d4f
font_01_sfnt_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 10920 bytes
SHA-256: 6609c88d80accb38d9b48433d6817184c9d1cd5eb5b50a843551b71ea31f357b