Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fffe945772bd4dd…

MALICIOUS

PDF

74.6 KB Created: 2021-04-24 00:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 654e469bcc91f862c6a8065f50e5281a SHA-1: 54fc2b1f46dcd459265c6c20ff318a26b53a1145 SHA-256: 3fffe945772bd4dd13609fbe81a59d8ed4571b9502fcb60c9d2287367369ff50
156 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 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 0.9997

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 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.
  • 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://vilenefex.ru/strik?utm_term=is+a+roadmaster+a+good+bike PDF link annotation
    • https://cdn.sqhk.co/setanutoba/iVbQXnE/openoffice_draw_network_diagram_templates.pdfIn PDF document text
    • https://vokefepafox.weebly.com/uploads/1/3/4/3/134333292/wefogotawuxezuteweru.pdfIn PDF document text
    • https://cdn.sqhk.co/laxuweredex/EbifRig/monthly_budget_template_for_college_student.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/fasegumajib_jasonoso.pdfIn PDF document text
    • https://cdn.sqhk.co/figegixo/GjdEjbD/gisefapug.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/FhcHZSY/sumakab.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/fbd15105-5919-4922-add9-5e7781377b6f/seiko_chronograph_100m_watch_price_in_bangladesh.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/discount_payable_in_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcef82e4-96c0-48b6-8bab-c322878f376d/what_streaming_service_has_harry_potter_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adf517df-38e5-43ea-a6b2-9efbe3cb2efd/ap_human_geography_textbook_the_cultural_landscape_13th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08578a7-aab7-4ba2-aff4-7f444b59859f/how_to_watch_big_little_lies_for_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fda34eec-c680-47a1-911d-606a03eb377a/epictetus_enchiridion_greek.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/what_home_improvements_are_tax_deductible_2020_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/951f11a9-87db-457d-b898-fcd3dd0ff09c/quantum_warrior_the_future_of_the_mind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b396c1c8-c6a9-47ea-a595-6d87ac4ce5c8/zawewefomuxofetegowawo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52168f65-8eb9-4967-ac41-6ea65fed090f/wusuxedowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8118856-2eff-4b3a-929e-9614cbab3f6b/craftsman_chainsaw_parts_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8206f1f-a350-4347-b762-0bc070f83833/lanujizab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad867147-d065-4e5f-9852-98c9cb38b430/informative_speech_topics_for_college_students_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5219579-e995-4a78-b72b-15e0008541a1/delta_4_in_1_crib_reviews.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_off0000e69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69D 5256 bytes
SHA-256: 8ce0db44da29c78dd5c51d75eaa9bafce2cf4b6503714fa1e3d7809e0c6f04b0
font_01_sfnt_off0000f866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF866 11064 bytes
SHA-256: 4f580a2e18cf1eec6e45d4eb0685871ddbd9fd74b080f24fa4093bed82a78fcf

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