Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed4af1f41bf4661…

MALICIOUS

PDF

104.4 KB Created: 2020-11-20 07:01:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f4beda001e9ce668202922bd2da77b91 SHA-1: 1293d1d0d2b1cfcff042b86d05aca90b08a12245 SHA-256: 8ed4af1f41bf4661beb4b987981c4f284e2512804ed82f35cadfd56ced049113
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffi.ru/strik?utm_term=jogos+de+pinguinos+vs+ursos+panda PDF link annotation
    • https://dutajidadu.weebly.com/uploads/1/3/4/7/134730474/tizedeniluxiz-gefowigujotubu-senunomikale.pdfIn PDF document text
    • https://gatixitawenubik.weebly.com/uploads/1/3/4/6/134643062/327a7de9fca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_5f9dbf6116841.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369333/normal_5fad9b8e78d59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411218/normal_5f93b6fee83cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_5f9420cb161af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450434/normal_5fb2face79a9d.pdfIn PDF document text
    • https://towetebofipu.weebly.com/uploads/1/3/1/4/131437669/fff884f3706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374196/normal_5f90b8abd5d97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480732/normal_5fb529e639ad3.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/zoraxegis.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/3f7668f0-8dcc-48f2-ad9f-4f469781bd63/ima_flirt_kiev_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/72329409149.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/legal_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85ff7a1b-6017-4087-9f49-56f3ac9f25d3/10755046583.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_off0001590b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1590B 5144 bytes
SHA-256: 76e16c1bac999aa47ff08cd0df395c21795f5ce30df9cc11eba3709a21986ee2
font_01_sfnt_off00016a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A9F 13180 bytes
SHA-256: b2f1821c8bd1f2eb3224f0401506c83b40b9204e4272d4d298eca4ca677187fc

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