Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b65c9c24f51618a…

MALICIOUS

PDF

74.0 KB Created: 2020-11-23 12:21:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d7d362ca21917caae55f69191dd6c4c1 SHA-1: bfe8de9e922e6ce3a6751cf0592a5ed01044e960 SHA-256: 5b65c9c24f51618a5d6b1e59f9a02d4af20981d402d2b5a63afca95de297cc98
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to a domain associated with phishing and malware distribution, disguised as a digital converter box. No scripts were extracted, but the primary attack vector appears to be directing the user to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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=ematic+at103b+digital+converter+box In PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/tubirinipararidewalo.pdfIn PDF document text
    • https://fafofezun.weebly.com/uploads/1/3/4/3/134338513/nakipigakazus-xufozafi-gafigotuk-fuxojo.pdfIn PDF document text
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/a91e9e205e.pdfIn PDF document text
    • https://dugajivesunilo.weebly.com/uploads/1/3/4/8/134866737/a984059d2.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/21b4b8bc-aca0-4fbc-913d-77ca671c06d4/4812548870.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3802d022-28d7-4b7a-8b73-f273f9890a4e/11776718520.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/billie_jean_tab.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/range_of_a_negative_parabola.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/43281978916.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_off0000e26c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE26C 5664 bytes
SHA-256: 6361d157073c5dff8dad0f76e8fc3e56bb6409fbdb63cab66c52427136d84b94
font_01_sfnt_off0000f5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A2 11064 bytes
SHA-256: 5537c8c6cbdced3cbb804abf88bf4f0ff4b4ee564c377908359663f154ba4b0c