Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6977fec23e46713…

MALICIOUS

PDF

72.3 KB Created: 2020-11-29 20:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4380af9c03a4d6cdd790a7c668530d8c SHA-1: 2b7be9348bd26a1fc73cb0c6b6142a2dd3e4e6d3 SHA-256: b6977fec23e46713e5bbed0b4cd124fd2a0c1055a2a1f714925b275de8d74bf5
154 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 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 0.9997

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://ggtraff.ru/123?utm_term=most+venomous+spiders+in+australia In PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/8a4de6641.pdfIn PDF document text
    • https://mizazilat.weebly.com/uploads/1/3/4/5/134528341/dafodokexovisizipi.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/wujivoj.pdfIn PDF document text
    • https://nipobajomofak.weebly.com/uploads/1/3/4/6/134641158/tawixavajagen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382771/normal_5fb8811a62914.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/cd7f4797-ed76-4b34-9409-9d18e8d1560d/55427288836.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/affairscloud_banking_awareness_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/cooling_tower_calculation_formulas.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/marriott_employee_handbook_2017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80638ac-3dae-4f5a-b777-e3cca73e2f57/galadewofelezuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/782b2db9-a8ec-4255-b891-4e75e3d7d605/guajira_flamenco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f37606a-3450-4bab-a374-418d4a020a25/60788578173.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_off0000df1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 5172 bytes
SHA-256: 35ccb2453e7e50d746cf8a8cefc4173ecd5f54dde96164e8faa8e65f4ac0474c
font_01_sfnt_off0000f0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AA 10584 bytes
SHA-256: 97a4fb4ce4084d80e3b95df93376e09bfd66093ca49963f7e5cab0745747c56d