Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3d003beb85f31c7…

MALICIOUS

PDF

93.6 KB Created: 2021-05-09 15:33:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 78eeade64b053c1f3adc972be4b14dd3 SHA-1: 07fdff29af18ac8133901ef95d7a2bfd9a02489c SHA-256: e3d003beb85f31c7d81e62f20ec52cd4620a243305b63fbd666b3542ba14d8c8
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body appears to be obfuscated or corrupted, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/strik?utm_term=kenmore+elite+he3+washer+drain+pump+m75 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4461207/normal_600121ace8550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_6016441e23c3f.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/2uxpCDz/xalalib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_6014d935cff10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481985/normal_5fef03d22d85b.pdfIn PDF document text
    • https://cdn.sqhk.co/kixobaza/ahbijAw/40011618527.pdfIn PDF document text
    • https://cdn.sqhk.co/bubarozotuj/EIgjajf/microsoft_word_operating_agreement_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_6053d7f0ec88c.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/9164a984-8582-4742-b8d0-f6aa5035c7df/caracteristicas_de_un_algoritmo_secuencial.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/what_is_the_best_poem_ever_written.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_e5cdbe842992445f9c4cbe32e6e3875d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/the_tcp_ip_guide_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bd10b7c-02e1-4d9c-ac05-3c267517c989/let_us_make_man_in_our_image_trinity.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/jeramovazamuxag.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_59e0f9de5fdc4668bd5f5c325b37d587.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b59732-f7ab-48ed-b618-f7e0584d5c58/46074826623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/156fed89-32d7-469c-9e5c-bcfe2d5903ec/how_to_save_mp3_to_iphone_without_computer.pdfIn PDF document text
    • https://a2876ee3-c470-454a-91e2-e108d831033a.filesusr.com/ugd/e8dba5_32dc4ecdca4440ed9ce7cba9c07ab799.pdf?index=trueIn PDF document text
    • https://e06e8306-d71e-4c92-aa1b-e8c52eeb44cb.filesusr.com/ugd/bc4951_88e36e441d69470b84a70fe9ec0d352c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/solonebosop/japilote.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/sededezusopaxavulorefub.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/psalm_23_1-6_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/how_to_pay_brinks_home_security.pdfIn PDF document text
    • https://d190c387-1498-4382-a59e-98d1a0a9794c.filesusr.com/ugd/a91264_c4d3342790644910901b1cd28f5b0d03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lixuzo/old_school_music_listen_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/82718842253.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_off00012d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D48 5628 bytes
SHA-256: 6f31d9f26bd694012f6e102c6df82ad59c1ea0798c1d6d1b40e2a828f4e0dca1
font_01_sfnt_off00014060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14060 11780 bytes
SHA-256: b98611bd9d277e0983afa4e814f9b70f2c140cd1391eeecc0d73d7d7658b5435