Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1cd06c30f010f2f…

MALICIOUS

PDF

73.6 KB Created: 2020-12-17 23:06:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ebf0df93f145a24a7e6c79cc44465e2a SHA-1: 66e2480ff1b5aa9fe46f680236dda1a0c5633878 SHA-256: e1cd06c30f010f2fb2fdbd5a1886ee2fb72a069921f692c3f9008f6355cd8fc0
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 detected as malicious by multiple heuristics, including a critical finding for linking to known malicious redirector infrastructure. The document contains a mass of external PDF links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://cctraff.ru/strik?utm_term=dragon+age+gift+guide+mod, which is likely used to redirect users to further malicious content. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=dragon+age+gift+guide+mod In PDF document text
    • https://static.s123-cdn-static.com/uploads/4482636/normal_5fca6fcff2ad0.pdfIn PDF document text
    • https://xefosujusiro.weebly.com/uploads/1/3/4/0/134042031/jemarelibutovo-welofef-nanupaberut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390638/normal_5f92428bf3a0c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_5fc8e90d8199a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f890e19c7a0e.pdfIn PDF document text
    • https://rikurifijuse.weebly.com/uploads/1/3/4/6/134681474/jomukirenetalezatobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5fd7b06bcbdd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388405/normal_5fbcd571a4d37.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/7d816076-0bec-4dcc-876b-7061f8415bc7/89513771315.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d12c3dfdd95b60d4a66f/t/5fc0e70ebc819f1cf4f8efdc/1606477583884/vetilutipemonaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd874557-53e1-4315-a6d0-405d6c86e4ca/17855451893.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d49a16f6d44b07be6b5d/t/5fc4cf0718e72e5fdb6f8a20/1606733576509/mopobelezomevup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2624b98a-e95e-4ee0-9e4a-5256c5241106/chasing_ice_worksheet.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_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 5016 bytes
SHA-256: cd3a3500947d377305e813cb4d31b87dd2cc45e5d064507fc9459fedd77593c3
font_01_sfnt_off0000f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 11016 bytes
SHA-256: c68d06a7277e5e68e6066f7f07fcd76b0f508415369659a763e43ca766bff26f

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