Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed37f3837cd88147…

MALICIOUS

PDF

212.8 KB Created: 2021-03-26 07:53:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7ecad157929e7095d5df5d5a3de44805 SHA-1: 588a88e219757fd4165f4c4df9a7b2f83e90efe0 SHA-256: ed37f3837cd88147ba4b118baa8b7629a4d17c8558e570530f660b3fb1943019
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wix?keyword=texas+go+math+volume+1+answer+key In PDF document text
    • http://melidagerukebel.sportsontheweb.net/pajon.pdfIn PDF document text
    • http://salearea.pro/juxusebi6veom.pdfIn PDF document text
    • http://richmaya.site/domiwoforivuu2.pdfIn PDF document text
    • http://jakartapro.xyz/elite_platinum_maxi_matic_pressure_cooker_instructionsiv87d.pdfIn PDF document text
    • http://lololoj.sportsontheweb.net/bosch_500_series_dryer_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/xiruregexibe/iio4gkF/21752065182.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/fgihhCe/82537538767.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/rubidokezive/accountant_experience_certificate_format_doc.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_0efc8f76549b4ba8bac76704854a74e7.pdf?index=trueIn PDF document text
    • http://rabatelekovufar.myartsonline.com/harry_potter_y_el_misterio_del_principe_libro_sinopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6065edda-db5b-48ad-ad67-d14e6a328887/ap_us_history_textbook_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db524dd8-130d-47c8-99e6-03f3142a560b/4189651400.pdfIn PDF document text
    • https://16fd32d6-95e0-4b29-89ad-7162b4f2ffbe.filesusr.com/ugd/9f4b57_4ebedb00eeca46399532983798aefe9d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6fe3bf7-ea15-4b72-90f2-482b1ddd1ac8/81946472956.pdfIn PDF document text
    • https://s3.amazonaws.com/gedexim/mi424wr_rev_f_specs.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/68935885971.pdfIn PDF document text
    • https://02bc4616-4eae-4b38-b2c9-0e654f754ee0.filesusr.com/ugd/069df5_2b85e8ed60cc4eaebb1f6e10653acb9f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/what_is_the_ending_in_the_book_defending_jacob.pdfIn PDF document text
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_3cfb3ad7d1bf4f04a67b94b046c4c066.pdf?index=trueIn 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_off00030aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30AAC 5484 bytes
SHA-256: 99ab85c1a0d29f349f618574d4c19522e27874aea3347189f538ed01e7ce367d
font_01_sfnt_off00031d4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D4C 11820 bytes
SHA-256: a9c867f164009482dda14e6872c3abaab1eae489d4cc6f540b3d431842866e88

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