Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ad865482ec54a7…

MALICIOUS

PDF

76.3 KB Created: 2021-05-28 14:54:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 265a122689e31fed3448fda2eb0c2312 SHA-1: 2743b6c8164cc48b261e5cb6f339ca759f8fba1f SHA-256: b0ad865482ec54a71b794ab9141b107cfbf140ac19a676581bb97f196180840e
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, with the primary URL being a suspicious domain. This suggests an attempt to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://resalured.ru/strik?utm_term=quantos+litros+de+sangue+tem+o+corpo+de+um+ser+humano PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450148/normal_6019023e61e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492574/normal_605a71ed44d23.pdfIn PDF document text
    • https://bevoparekev.weebly.com/uploads/1/3/4/0/134018333/9254530.pdfIn PDF document text
    • https://kivasemav.weebly.com/uploads/1/3/2/6/132680863/5f2896e5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388046/normal_5ff281506612a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_601a77aa89108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499005/normal_605c5a75b0cdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380411/normal_5fe8f9de547d5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460233/normal_5fed73fde7aad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_6018369941eda.pdfIn PDF document text
    • https://wesofozuxo.weebly.com/uploads/1/3/4/2/134266961/zewokapinesarijeter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411714/normal_604362f73d6a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444369/normal_5ff33d3d0176e.pdfIn PDF document text
    • https://muwivagejexe.weebly.com/uploads/1/3/1/3/131379070/tagisa_kerozaburi_fonozu_bonuvoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466173/normal_6019376896dd9.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/8c07cb64-7e70-4a1d-96de-e256a64a1b84/46226819208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d2217c-288d-4789-a5d4-bf6d74d3519c/what_does_jelly_mean_in_texting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4635ca8f-638f-4531-be94-2c4989eed18c/best_free_c_programming_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08049b46-b7b6-41b6-b7d1-f020b9c47158/what_are_the_qualities_of_servant_leadership.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_off0000e827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 5548 bytes
SHA-256: a93430f4e56e2675d25d242a0299f360c0f0cd0763567f59821ab6fa9d21319d
font_01_sfnt_off0000fad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD3 12932 bytes
SHA-256: 8e328f11a546708b956e81103023b079aee79fea550ad6c27d2377b06fe5ea7d

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