Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27f4da54e9923fb…

MALICIOUS

PDF

68.9 KB Created: 2021-03-23 21:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f4807821c18f808f37045334ab597b1b SHA-1: 9a039922ac88d5ebd8d960f928d05332a1a6e7cc SHA-256: d27f4da54e9923fb51bce680a8a55a349c08689725820be7ed2ece6a3e0e2e05
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 0.9998

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://soxebez.ru/wix?keyword=dr+claud+anderson+black+labor+white+wealth+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503033/normal_5ff5c29e63709.pdfIn PDF document text
    • http://fasusugexewi.22web.org/zitidod.pdfIn PDF document text
    • http://idealica-italiaufficiale.website/sibikupimukulelapnu0h.pdfIn PDF document text
    • http://priz24.site/mbo_folder_service6tm4f.pdfIn PDF document text
    • http://hook-up.fun/tegutok3ez2h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470228/normal_5fef64b19d9b2.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/chinese_dictionary_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464082/normal_6022e7889afc0.pdfIn PDF document text
    • http://bumululoru.mywebcommunity.org/70913748005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372963/normal_604ba7d161ed5.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/49f96048-e21d-4af1-908b-c37bf523048e/58280971337.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/how_to_test_a_faulty_diode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7118932-d8ba-452d-a446-2cf1bd1a9257/15110093025.pdfIn PDF document text
    • http://podixevobelataw.rf.gd/solucionario_mecanica_vectorial_para_ingenieros_estatica_capitulo_5.pdfIn PDF document text
    • http://misugivunuzu.epizy.com/synthesizer_sound_design.pdfIn PDF document text
    • http://manutilo.epizy.com/anticonformiste_dfinition_et_synonyme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f493205-719f-45ec-81af-4763b5e419d2/wahls_protocol_dinner_recipes.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_off0000cf3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3A 5540 bytes
SHA-256: 2bc4d78ff3350b85b3e3be6e4874aed720d72c79f364f039c5d7cd4fab3bf3ad
font_01_sfnt_off0000e21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21F 10116 bytes
SHA-256: 7a3a0ffcf5a3cf51b999a368b19bbbf07f6c7f09cd5ef9854618370a65eec41b

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