Malicious PDF — malware analysis report

Static analysis result for SHA-256 cedbfd417488ae17…

MALICIOUS

PDF

77.2 KB Created: 2021-04-08 10:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 532a219d2559114cce30e8c5a512d28d SHA-1: b1ac85ddcb475a999b3b5e3a3716bc60d343ab78 SHA-256: cedbfd417488ae179690eeea8286905ef6a85512fdf633d80295c62e0f09c18b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/123?utm_term=how+to+add+gridlines+in+excel+sheet PDF link annotation
    • https://cdn.sqhk.co/lisutovudaf/f0gd2Uh/space_invader_75013.pdfIn PDF document text
    • https://cdn.sqhk.co/jojojidatun/aOKgE8M/wallpaper_laptop_hd_liverpool.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/breast_cancer_project.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470832/normal_606a8ae4827bc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471682/normal_5fecc6343aae0.pdfIn PDF document text
    • http://vijakaru.iblogger.org/god_of_wonders_piano_sheet_music.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/beats_studio_3_wireless_best_price.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/wizitifowubux/xolijejuxag.pdfIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_f595d3da108d417c9613d5b35a894ec6.pdf?index=trueIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_f5dc94c7ff374dc9a46db4c5fd9bae03.pdf?index=trueIn PDF document text
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_a4a426129358470d99666b276138d164.pdf?index=trueIn PDF document text
    • http://zitasixan.atwebpages.com/how_to_reset_my_samsung_top_load_washer.pdfIn PDF document text
    • https://18e7ef82-5c75-44fe-ae22-4c356c2c9ce0.filesusr.com/ugd/749e61_e0b9f0d339c345cf90a069fcdee51cce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dinilederu/fraction_number_line_worksheets.pdfIn PDF document text
    • http://paguxesij.myartsonline.com/jevazaxidudexubunufuj.pdfIn PDF document text
    • http://disozisujenat.epizy.com/savage_grace_parents_guide.pdfIn PDF document text
    • https://dc010c70-835d-4b56-8cb0-1e1bda7cab64.filesusr.com/ugd/fb576b_06d5e1e9a76e4d10b51707467e19d46b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/bogeb.pdfIn PDF document text
    • http://wogafut.rf.gd/bmw_usa_performance_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/cst_performance_suspension_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/joining_sentences_with_relative_pronouns_worksheet.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_off0000f18e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18E 5324 bytes
SHA-256: 4f0b88c38626bdd69938c0606baf6c38b241cdb3f836584a2f800bb2aaa7bab4
font_01_sfnt_off000103b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B6 10304 bytes
SHA-256: 0ad56b32db6585bf221b1f016e14cf3710ba2b0e5c780eabd3d982fcd4d1d1ff

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