Malicious PDF — malware analysis report

Static analysis result for SHA-256 49dd4a47f2fabf4e…

MALICIOUS

PDF

91.8 KB Created: 2021-01-05 18:28:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 179023d5a52669526262ba7b08514652 SHA-1: dc48abb1ed8842dd346df31b5635d822f7e445dc SHA-256: 49dd4a47f2fabf4ebe743f2fbbee715015d2a0a96be67c680308219bb3be8675
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection strategy. One critical heuristic indicates a link to known malicious redirector infrastructure, and another identifies it as a PDF SEO link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://gettraff.ru/123?utm_term=math+in+focus+grade+7+answer+key+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4479904/normal_5fe381c17f171.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/gcjdYZ3/ombre_nails_diy_without_sponge.pdfIn PDF document text
    • https://vaxuzumop.weebly.com/uploads/1/3/4/8/134870956/refiwad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367648/normal_5fe2dce25ab78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471250/normal_5fa884d00f297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f950e08da471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379355/normal_5f8b82b87454c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404287/normal_5fb3fbfacdbee.pdfIn PDF document text
    • https://jinunezig.weebly.com/uploads/1/3/4/3/134308797/midutuduf.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/3b887252-2e83-4fdf-bee7-ef5a6f50b158/bitiromudubatimoruzeka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068550e7-c539-4766-bc04-32711274c1ac/11990897490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f1078d-ee32-4474-900c-5816f0da62a4/velatijabopewewuguv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f395be2b-d7bd-4dcd-b6fe-2356d2ce7f67/roxituxeza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9db296c-6659-4457-93b4-6c23e995da82/seal_team_season_2_episode_12_recap.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_off00012691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12691 5728 bytes
SHA-256: db07f3c14082e9d8fa7e09d9312051cfd4bedb543a482992693e602265b95d4d
font_01_sfnt_off00013a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A44 12500 bytes
SHA-256: bcb96f74166ebde4e9c6e7a7edcf4782571b1c19db42e2d86656b0eb33254a2b

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