Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef87fa65a259a301…

MALICIOUS

PDF

79.8 KB Created: 2021-05-30 07:02:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c553f48ec006c48465ab673490c1a4a5 SHA-1: 1dcdc65bbcff3084b8089ea1c70bd9e9aac7b628 SHA-256: ef87fa65a259a301069261b0a3171686a6e0512bc899a5cf09d5438f394d3468
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, identified as a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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://jacksth.ru/strik?utm_term=reponse+questionnaire+yvain+le+chevalier+au+lion PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4450884/normal_5febeb020656c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379610/normal_5ffc6c6e83c5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474998/normal_601b57c97993a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4527902/normal_603b39071e12c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491965/normal_600acb622a0a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463560/normal_605fac37e0818.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fcac7c188918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377400/normal_6005541467c54.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/2f10dd22-0ecd-46a6-b570-7717534e1803/8686003036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d56ec0-0fc8-42b7-95a7-66ff1e404c3a/28753555387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b294854-65dc-40b6-8964-2aecba551cd0/elle_decoration_russia_media_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b5a7baa-ec93-451d-8963-3108b006ac83/delonghi_heaters_manuals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/640492ac-5cd8-444a-8948-e171fdde077c/avalon_vt_737_plugin_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfe3fa55-d5d6-45ce-a21e-506e9c1f29ac/3817565756.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68b4990f-ff42-4c6c-8c3b-0edc09ce556c/nizafez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e3475a4-5c2d-451f-89e4-caba3d987b7f/bipowuximabolobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e724e610-a63c-457f-bff5-9df5711f90d3/dijiwuvizanaware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf388109-2334-485d-89f4-d79199b3e039/does_macbeth_kill_lady_macduff.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/195ee01b-b25a-4f47-87b4-618053764b24/how_to_convert_active_to_passive_voice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26fcf337-9cc7-43f0-b15f-5f080d882e5f/vejabezilupixigoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b04133d-20d8-45c6-839e-f0a48a3b6b12/fugebadegasotaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ac79aa-583d-431a-b6c7-848821473830/linear_algebra_and_its_applications_5th_edition_solutions_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e7928d8-9696-4a70-a34b-16db6d66db9b/how_to_use_cordless_waterpik_water_flosser.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78b0fef3-d286-4dda-b462-8a05430c3628/lowrance_elite_5_dsi_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb4240ed-dc71-454b-b5b2-4fd106f3f2e7/does_prodigy_math_have_an_app.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_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 5316 bytes
SHA-256: 31d281a0da649922ec86d3e0cbcdf1696bed9425a4250236f0e3b67b5800775d
font_01_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 12968 bytes
SHA-256: daa4e775252ceb08446add0b7e068d1cf5d1f97fb0024d2408e273a0417c26e7