Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d906d6d62789fe…

MALICIOUS

PDF

63.3 KB Created: 2020-11-11 10:21:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a8f11eafed4e2bfc01d3090c0ed61b40 SHA-1: b2d1ac00b85fcb005c1d593c133d2285cfc69edb SHA-256: 50d906d6d62789feef72ee0c50acb71cde2e3fe47cc9f873ef6737796f9794fe
222 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The presence of a 'download button' heuristic and the ML classifier's high confidence score further indicate malicious intent. The document likely serves as a lure to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/123?keyword=mrs+moseys+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f8e598fb31bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f9a43ee33618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5f8d7b0c07bc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_5f9253d02d35f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387939/normal_5f8ea33f80f57.pdfIn PDF document text
    • https://juromimabosag.weebly.com/uploads/1/3/4/6/134644914/8706657.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5f8fa50b97868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370062/normal_5f8cff43a4955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_5f8ba15acf482.pdfIn PDF document text
    • https://retagavit.weebly.com/uploads/1/3/4/3/134363188/goxuni-zosijatotaw-fikafomaba-lujesabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386606/normal_5f99b536df775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_5f9d24b5e3462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416940/normal_5fa9d1a0efa97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5fa1ffb4e82b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420906/normal_5f9678ae5cc43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB158 4508 bytes
SHA-256: d9af093350b20032f6116baeb2d0191734653be84ad48dcc9df2845a56cda505
font_01_sfnt_off0000c0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AF 9824 bytes
SHA-256: 9f9ca7ec1acc5908cd090cefc6bc2b9d12e44783d5c0fcd0aaf278f89ec85cc4
font_02_sfnt_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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