Malicious PDF — malware analysis report

Static analysis result for SHA-256 7073f4890ac9ca0d…

MALICIOUS

PDF

95.1 KB Created: 2021-06-07 12:20:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: f50ad8338644ba33d5c4408ff1577bf8 SHA-1: a9b9bd16e1e29bb865b65010c099b76ed909408c SHA-256: 7073f4890ac9ca0d16809f1f7241c7b6e08de113f4e751e48298780ac64277e3
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/123?utm_term=tipos+de+cateter+venoso+periferico+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414360/normal_60006d6300dde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_605ab2ce1f09f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381988/normal_6058fcefdd3a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460966/normal_5fcf6325acf85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_605917509a57b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391621/normal_60151d0b6c713.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dimutojopog.pbworks.com/f/what_is_autocad_plant_3d_used_for.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/w/file/fetch/144639729/why_is_my_maytag_neptune_washer_leaking_water.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad0e7c6-9d01-4f42-8d0c-ea9bcc5eb111/how_to_clean_dyson_v11_high_torque_cleaner_head.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d3f7ee-fa0a-4ba8-babd-bdfc52a90f56/76781437370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/717a2f02-efb1-4638-9909-d9f1374951b2/52617277398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7809fc33-3658-4cfb-adce-a34c3cd26db5/organizational_structure_definition_business_studies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae44a4c-2a0c-4258-a4ad-970c970178fc/41422501173.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb31efc5-521d-4b61-aa9e-b749295672ce/gokimawemolizemuv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadd2627-4393-473e-84bc-f914e0f1f681/las_bicicletas_son_para_el_verano_summary_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d580b422-9bb9-45f3-b24d-cc8a9353bf02/78494272287.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccaf4f4b-982d-47db-9a49-bb0a393e4c7b/33921840208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de6e4a96-c0c6-4bb8-b84e-e19fe1df9b1c/auld_lang_syne_is_a_famous_poem_by_whom.pdfIn PDF document text
    • http://tisowowuduwe.pbworks.com/w/file/fetch/144427026/kibilexotavenugel.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_off00013268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13268 5128 bytes
SHA-256: 27e5ef616eb24fd171ef99a31742c888e0f8ab7ca11a906801ab1e8060358597
font_01_sfnt_off000143ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143EF 12736 bytes
SHA-256: 065db8f7569b5841006031cf982f905ad897349caff1ff1466868887c23f8fcf

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