Malicious PDF — malware analysis report

Static analysis result for SHA-256 7891ea88e2e34327…

MALICIOUS

PDF

78.8 KB Created: 2021-05-29 20:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0264e0e1b0abad6e952532dd39a80b0e SHA-1: 216ca1419c1ba4429e6f9180f604756a269f9b48 SHA-256: 7891ea88e2e343277296cd623a5f58695e03458ff48e9415c40365e3b03f5005
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, identified by heuristics as a potential phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/strik?utm_term=is+there+a+twilight+6+movie+coming+out PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368953/normal_605a8e34d5297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470221/normal_5ff53bb699b27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_603a67d87b8a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370054/normal_6022fec601344.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_5ff5be252d19f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_600ffd5e33c37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486220/normal_60223ea8d02e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377928/normal_5ff620f6619e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_6025ce15b8c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_602163b0ee9af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378386/normal_606637e331ff2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415950/normal_5fdeac787d259.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/4c792d4e-64e9-4d32-a277-ef263056d94a/19962121507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca283d76-91bf-42f6-b0d4-7f10cf84ccea/2012_toyota_camry_xle_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca4c6ca-9e41-4f79-896e-2d9d12107f63/how_to_mend_broken_brass.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c145a532-f513-4761-9f66-21e0bc132410/57300739952.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba34fa27-88e0-4a8d-a082-347db2a56321/ripidetuzokudawilimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37916031-1656-43c9-b18a-9d1da8542d30/80175932614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b12de6a-861a-436b-bbf2-27d656054086/how_to_prepare_agenda_for_a_meeting.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e7f3484-eb3d-4d06-88c2-dbc7be658f0d/pexozafinoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9107b47-5af9-4d1b-b051-9dbbf4cf6b46/do_gyms_provide_resistance_bands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43f65967-d371-4e49-8469-d54c173537c6/16564915754.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_off0000f486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF486 5456 bytes
SHA-256: a97471d5b8917c830b7d2723b0d5093cf0d6fa7482757abb5a717a74905656f9
font_01_sfnt_off0001070a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070A 10864 bytes
SHA-256: 0339e8cae780814a0a4f624f996201547f5a7bc2bed11367e210774f6d98254e

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