Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4844008141cb42…

MALICIOUS

PDF

68.9 KB Created: 2020-12-18 20:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 55bebc76b40fab1299a99e96e9206148 SHA-1: 4d8675d1584f4271f664d9532c8f450ad06f5bbd SHA-256: cb4844008141cb42d7a1d012627e974cda8ebc194531083bc91b6e144b8969a5
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL suggesting a lure related to tracking a Walmart order. The presence of a PDF link farm heuristic and ClamAV detection indicates malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a social engineering attack.

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://trafficel.ru/123?utm_term=track+walmart+order+number PDF link annotation
    • https://fekugutupufug.weebly.com/uploads/1/3/4/8/134876907/9861572.pdfIn PDF document text
    • https://rubirilubuz.weebly.com/uploads/1/3/4/2/134266621/paparikeroboj-fufitiras-patagigarosa-pofibiwodipov.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/22a20a2d-2d6e-45b1-9933-4a8486077544/expert_advisor_programming_for_metat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a2afca-2570-4492-abcc-2149dc9ba9a5/tisipodit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93d92d1-940f-4056-86cd-99d7372001cc/pa_1663_form.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/horsted_junior_school_ofsted_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d27e954-2d02-4fba-afc4-cde4bbbc507a/xarusatetited.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8851f0b-abf2-4400-88af-6a3c299449a1/pefobelenorixumafotupitij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66441fe4-93f2-420c-a5f5-5b8239f50d92/63976307603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebd2dadc-d8f9-4eb0-b020-955631b52744/gexabaroroxesara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8601d36b-49d2-4123-af61-790bb0e71d05/playview_apk_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2332217-4f2a-4c54-8ad9-913563e3d53c/36156965893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9488f074-97d9-456f-9e3f-0c81665d5a8c/que_es_la_teoria_sociologica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d847330c-1e94-45ec-aa4e-e67f79d3e22f/descargar_manual_de_ortografia_y_redaccion.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/17821502719.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_off0000ceef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEF 5152 bytes
SHA-256: 5573ca495ee32c5fddb470a77aaaf436a46a571db18409a1601c6eb7236a73ec
font_01_sfnt_off0000e071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE071 11508 bytes
SHA-256: ae3788d89a3f6db2400444efa71100ee17bdc31c9912e15c3dc7a9648f50e8cb

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