Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8b844fa46aafa9…

MALICIOUS

PDF

72.8 KB Created: 2021-03-22 14:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8dd6d0505a98591fa09673e641f4885a SHA-1: 23558e2468b927a5bd7fcb93a4cc58b9f0de8392 SHA-256: fc8b844fa46aafa96c5fbccddb9822186c274fffd22d527314aaa9e19f7403eb
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 malicious 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 suggest an attempt to redirect the user to a harmful site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/aws?utm_term=log+cabin+table+runner+pattern PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416786/normal_5fdcedd89104e.pdfIn PDF document text
    • http://xutefizil.getenjoyment.net/zinalavubifiba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464734/normal_5feda2c9e0036.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369646/normal_5fe0d77c175a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_60241a460680d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421611/normal_5fc90120611c7.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/que_es_la_cadena_de_valor_de_una_empresa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416811/normal_60214c75bed27.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475217/normal_5ffac1d0020a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426423/normal_5ff1d58abcc85.pdfIn PDF document text
    • http://kesuvajeb.scienceontheweb.net/bupolatelaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sixolose/grading_rubric_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/apache_openoffice_4._1._5_free.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/woseresukafasulinogezese.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/employment_insurance_forms_ontario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e8dada-bffb-44a2-8576-95eee9f47ee0/desktop_icons_not_opening_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/35933828452.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8d78e94-923a-4444-8dec-2704a56969d4/how_to_be_a_bawse_book_read_online.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/51280116623.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/kebavalux.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/22565284959.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_off0000dfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAA 5004 bytes
SHA-256: 7f572a7b872a82f0cdf9645a2f59d4977bad2c88125c6faff1f3e76de2e4d234
font_01_sfnt_off0000f0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C5 11004 bytes
SHA-256: a715bb2ebf4df2f47b2b305e8531307f38001be948849d37198f67ad7f452ee1

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