Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec8ca75e3e62750…

MALICIOUS

PDF

76.2 KB Created: 2021-01-11 07:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2c9363203e4d5fb8cd31c7334250db62 SHA-1: 8195fbea8b58853be419aa99e97bfef81444fb74 SHA-256: dec8ca75e3e627501dc1cafecf9edaba0099b2782a86ac5b7122858233c6eae7
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://cctraff.ru/aws?utm_term=poweredge+r730+rack+server+spec+sheet In PDF document text
    • https://site-1168145.mozfiles.com/files/1168145/81723004737.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_5fb991e6ccb20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385026/normal_5feb3fb7687cf.pdfIn PDF document text
    • https://cdn.sqhk.co/samidabaxik/ahajiu9/53261683876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393188/normal_5fcda4dfbf9a2.pdfIn PDF document text
    • https://jojurofi.weebly.com/uploads/1/3/4/6/134666092/vatatewed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5fe8e79d3869e.pdfIn PDF document text
    • https://matubupediguja.weebly.com/uploads/1/3/4/1/134131452/vojilijulebo.pdfIn PDF document text
    • https://sarejazaxixosib.weebly.com/uploads/1/3/4/6/134633098/541154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367951/normal_5fc1af4749ac1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD262 5540 bytes
SHA-256: d780e1dbf09b6150772d09608b755cf6d937bb16209271a5dd1b79853740b478
font_01_sfnt_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 15756 bytes
SHA-256: 80fc03a66253d9740ff1b11f1fda51a8af794989155d34829f52789f21532033
font_02_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3