Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f4561b45626052…

MALICIOUS

PDF

73.2 KB Created: 2020-12-20 04:02:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dc1a229202baf50b1fef1556b40c5f9b SHA-1: d96b162bb7cab0c4ef334db50d7e5b9c80a45f22 SHA-256: 05f4561b45626052f275e47e599f2670800659693522a5266fb672f01a420c04
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 0.9995

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://traffset.ru/strik?utm_term=low+profile+subwoofer+speaker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389821/normal_5f92589306625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387704/normal_5f8f53762d11f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5f91d64fda385.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f9a3c59affe8.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/b07ff50e-41bc-4177-98e2-74896a2da9a2/redopuvukaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be1af30-4e6a-4b19-9226-31ddd047084a/asco_gu_2020.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2db43a87939686414f218/t/5fc5e1baf81c9a2a0c6f130a/1606803898515/66108637834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f85c44-4304-4e19-a515-48257a82f27e/kugaputa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e1d773-58fc-48db-9552-0b4abf6b337b/41918019753.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e012831e-555c-4951-afc2-2999b0086265/virarabimuwi.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_off0000e169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE169 5132 bytes
SHA-256: a19b2e33dc99ca1234fefec18ee4d080bf5876e70913e54afd5d1d287e441d64
font_01_sfnt_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 11036 bytes
SHA-256: 4204f6dcd07ea33efb5793c1433a2c66031fb4c01ddc6fd459c077b249df6a01