Malicious PDF — malware analysis report

Static analysis result for SHA-256 0589d8d28b6f2b7e…

MALICIOUS

PDF

71.9 KB Created: 2020-11-10 15:22:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 4677e9eee0fbd15f14975cbc4b14c378 SHA-1: e6ba9e07a59b1b4d44e6fdb1a05f172666f7eb82 SHA-256: 0589d8d28b6f2b7ed3a756803d389f267dfe2828a4016f7b85fb3071c903aa40
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The presence of numerous embedded links, including a link farm, suggests an attempt to direct users to potentially harmful websites. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan.

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://traffmen.ru/aws?keyword=severn+darden+movies In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f9af1d4f3983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5f99d27e0c3c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408319/normal_5f9d21300ec1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448556/normal_5fa3992243a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_5fa8db614455b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f87650341af3.pdfIn PDF document text
    • https://pevinuwipe.weebly.com/uploads/1/3/0/8/130873962/kuvimup-rusotoxujuredod-ralirupumup-luximujovozi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f8b094f659ad.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/3b0b6056-0507-44f0-9f61-2264a06be329/xuxoniluxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6f86d4d-d7c5-4f18-af92-fce2f32c107e/kanikanomofaze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/605bc5c6-594e-4189-bac9-5059cab65655/50386660635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ddb8a6-872f-4fab-972c-30123f897e8c/budefazodusudurimojum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0831567b-b050-4e19-ad14-c3133ee8e7ce/88546140143.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_off0000dbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAB 5104 bytes
SHA-256: 30524efca613c7509aca311ac7825de9ac1d2a758d598bda3bcd9e81ede4ccea
font_01_sfnt_off0000ecf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF4 11108 bytes
SHA-256: 7ca5048470d0d0005938a06cfc90117f8caa143eb800c2a2ff76ac0ce9de0b21

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