Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e1e819e03960ac…

MALICIOUS

PDF

79.5 KB Created: 2021-03-25 04:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2653e4ae4f39f30c7a6a2da33d9b88e7 SHA-1: 9fed648a3a0dd6242895a8c9eaeed85ed7745c4b SHA-256: d3e1e819e03960acdaa0e295c52a0852dbf4f414aa7912c526c1dd310eb9fdf7
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, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

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://nipisod.ru/strik?utm_term=how+to+make+flying+lanterns+out+of+plastic+bags PDF link annotation
    • https://cdn.sqhk.co/gewewoturila/gjgjgdl/chris_harris_jr_broncos_jersey.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_6050efb5a9de7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459337/normal_5ffe8c62746dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_605bcdfdbc63b.pdfIn PDF document text
    • https://cdn.sqhk.co/nilesatu/jSYSnQd/1378563522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470825/normal_60265938ead25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421365/normal_605bdbce7b748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452621/normal_6035e3b78b145.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_5fd2cf29a3b82.pdfIn PDF document text
    • https://cdn.sqhk.co/divabasom/gimbgFO/viking_boats_names.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/cced2889-6b75-436a-ba64-3cc2f3bd8b38/bepanitenutanazalar.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/bookman_itc_lt_bt_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/pokitizofibetadebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8c0edfa-8c70-4c59-a2c1-e4fdc7d9a4cb/numerical_methods_with_matlab_implementations_and_applications_gerald_recktenwald.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/bebosazini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d25463e-8cde-452b-b6a1-858f5d3b96b8/tom_sawyer_questions_and_answers_chapter_2.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/how_to_build_a_life_coaching_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b116aa-e1b6-454a-a65a-ce01f95aab7d/polytropic_and_isentropic_difference.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/xomilis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2113369e-b876-415a-b16c-f18ec61c742c/vivajunadanigupexewebex.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_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 5692 bytes
SHA-256: e181cd3ada981f9a4597c704e27ea987cc56b9cda6faa11172bf68c5d9ab5101
font_01_sfnt_off00010bc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BC1 10732 bytes
SHA-256: 7e197d1d0804dc6a5e47392ef62aa6c6b6547374d872070caf61b9a48fce69fa

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