Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0994ac8e5e84aef…

MALICIOUS

PDF

61.9 KB Created: 2020-11-16 23:52:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: df7a30d805590c53eaaa9a155c0c7944 SHA-1: d73dc0291c13c0cc6f30dbf578bf45ac78f0c8d7 SHA-256: b0994ac8e5e84aef87bfc5c501adf28c921e7915b4771b00b740acce6bed46be
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://cctraff.ru/strik?utm_term=vay+ba%25C5%259F%25C4%25B1ma+gelenler+2.+5'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, contains text that appears to be related to payment or agreement, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/strik?utm_term=vay+ba%25C5%259F%25C4%25B1ma+gelenler+2.+5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445125/normal_5f9e05a540e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394061/normal_5f98f70ef05c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f98c9fcc81aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f98ccb244c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f9dc914ddbe8.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/9dc0fc1e-1b89-40b7-a7e1-278eb6eae900/6997902027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b42ebd-f53d-4442-8292-ac1b47e39fe0/pay_advance_agreement_letter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e3a16e-5513-43fd-befd-9d0e661e5a54/gawevopukawizu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2366f8-4680-4407-894c-5a161400c20f/xosofafosijuvute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85954eba-97ac-43cf-94fe-c6a5a362aa08/tunnel_run_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/zalutoxoxetulojil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d70260c-280d-40b6-bba6-4deeb1c6677d/21519958989.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_off0000b183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB183 5604 bytes
SHA-256: 62270e35597394082bacb47f3d38eb7e55195ddfc834562020c8cdd9416493b8
font_01_sfnt_off0000c493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC493 11740 bytes
SHA-256: bc46315d0e329c6aad88ec28ca76af6b8e3b4e0105a1759d3a141cedc3ef01b7

Open this report in the interactive analyzer, or submit your own file for analysis.