Malicious PDF — malware analysis report

Static analysis result for SHA-256 39cdae65709fcb63…

MALICIOUS

PDF

74.9 KB Created: 2021-01-12 11:30:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cc78a858c559e569061ac16866cafb2a SHA-1: 96be28e269eae85635df3a9a8996003ed4a48ebe SHA-256: 39cdae65709fcb63fbc411c1d23400214bfe195ed18ca9430adc04ced6a2c415
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded malicious URL point towards an attempt to redirect the user to a compromised site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffking.ru/aws?utm_term=counter+strike+go+non+steam In PDF document text
    • https://xigujevaw.weebly.com/uploads/1/3/4/7/134701692/8790445.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/ibgcmvg/34107459936.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390328/normal_5fa9946abda8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380230/normal_5fc1abb17d890.pdfIn PDF document text
    • https://vipozuguru.weebly.com/uploads/1/3/1/4/131483083/8915967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5fa4649cdc620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476443/normal_5fa6e58c60808.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/sideku.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/dutuzanob/quinceanera_invitations_templates_in_spanish_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/70854040895.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_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 4940 bytes
SHA-256: 031606279cc05bd71422dc0bf12100b990a86f4e75d356b579851f93e1e3155c
font_01_sfnt_off0000f98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98F 10908 bytes
SHA-256: cc91a8e08c81582c6d609bea7555dc52f9c7c35d2dffdf2c77e22c69b91f377c