Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b67d4fd56dd0977…

MALICIOUS

PDF

76.7 KB Created: 2021-03-17 01:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 5478cc28b72abb4c2fa69fb847c5f5d9 SHA-1: 5b32c8303febc44b1efe03dc427fa59623df2681 SHA-256: 3b67d4fd56dd097788a9b823995356ab133d349f0e1f367969c591090c8143c6
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 0.9995

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://bologen.ru/strik?utm_term=shuffleboard+table+plans PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4393345/normal_5fcdd0b02ce13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5ff6747ed61a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_603ffed1ca4d2.pdfIn PDF document text
    • http://bigpleasure.ru/84306072553sxrjf.pdfIn PDF document text
    • http://alexandreablog.com/kanifeditujxpy79.pdfIn PDF document text
    • http://detonic-shop.website/how_many_pages_are_there_in_pretty_little_liarsh1np9.pdfIn PDF document text
    • http://gnoogle.site/complete_and_simple_predicate_worksheets_with_answersj0dsr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409796/normal_603b029e6f322.pdfIn PDF document text
    • http://xusibuvuzos.22web.org/vevisigotovoxunuz.pdfIn PDF document text
    • http://itchia.space/how_do_i_reset_my_motorola_phone1qae0.pdfIn PDF document text
    • http://bakelenodizaro.iblogger.org/kitubiwimokopenava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixuverojezuluz.epizy.com/lopetopedekuduwazerug.pdfIn PDF document text
    • https://ecf8b3bd-8201-449f-a39c-156acd88681e.filesusr.com/ugd/97634b_e6d71aff3eb44c208532535dd768fd26.pdf?index=trueIn PDF document text
    • http://tozoxefig.rf.gd/king_crimson_discipline_album.pdfIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_f4ca746b5340478e85973f2a4b6696ed.pdf?index=trueIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_b95c887f65364364bbda440501298fc1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/bapuzijireboxo.pdfIn PDF document text
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_f0c51888813c45bd9d698e8f7564487d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/99738260092.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/cell_size_and_diffusion_lab_answer_key.pdfIn PDF document text
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_1dd53328bfef45a8ae5816c889529d14.pdf?index=trueIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_a2a792a4ca5348a7a609a42fa7a651c9.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 5372 bytes
SHA-256: 77fbc7a0770edec00a57a474fac5693abaa00a405e432b48d2a8db8e4a190a72
font_01_sfnt_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 10864 bytes
SHA-256: 68f5f7b481f301402691a863ecd022439a004dd6a0476cb1d753dc4eb12a03a0

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