Malicious PDF — malware analysis report

Static analysis result for SHA-256 247633eb50557fc9…

MALICIOUS

PDF

68.9 KB Created: 2020-11-18 15:02:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 310e160e579abf8323229072dfd5fd2d SHA-1: 6cfd864d9076b7ad6a8717f0efb39d099e1cd256 SHA-256: 247633eb50557fc960470966006b2e8306c15186ae60b5e78d4a44f4c93fc602
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded links suggest an attempt to direct the user to external malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://cctraff.ru/strik?utm_term=explain+what+is+cultural+pluralism In PDF document text
    • https://xemamipu.weebly.com/uploads/1/3/0/8/130813095/tixikijezoj_dagiboveso_javerelip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456989/normal_5fa5582479514.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_5faf8f1f0b8f8.pdfIn PDF document text
    • https://wesojejupeledaw.weebly.com/uploads/1/3/4/4/134446418/869339.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tobaziw/ansiedade_augusto_cury_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea2c54bf-8781-43bc-8414-48355cff3edf/prenez_et_mangez_partition_gratuite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/810c15dd-cc43-4d95-855e-0ac0d079e13b/molar_heat_of_fusion_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9770b02-aff5-4eb7-8e81-67b0ce1c06c6/f_test_stata_fixed_effects.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49b38bdb-e539-462d-8d2f-1de0e06ce957/636765576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a853072-b110-405a-92a2-48da71ff51fb/fiviweniwimejiputifix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83886a80-ee94-4fbb-99aa-280fe672e456/18349153213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd64cc6-11a9-4a8a-93db-e118607c64bd/73149673628.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466ee5d9-8e1e-4cab-938c-f1da47b5eed9/lexuzaboti.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_off0000d15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15F 5292 bytes
SHA-256: cedd25b1da4f401bf5e5c228d66735b6a0bd90287e9d4ea74816763707862042
font_01_sfnt_off0000e345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE345 10452 bytes
SHA-256: b1e4e88fc7e280b7c80949c380b8104c21867b3bdcb75568973c9b8ecdeb57cf

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