Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c9f36c8f6fea7ec…

MALICIOUS

PDF

80.8 KB Created: 2021-04-01 04:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3c333302e59c36bff7392e8125171a19 SHA-1: 5568f13eab98f626936c15e54ab58266f0e65002 SHA-256: 9c9f36c8f6fea7ec1a409306754a2b0203931990f672aec6e303ac5b925ffe10
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=bhagavad+gita+and+the+great+battle+pdf PDF link annotation
    • http://kudusakepupa.sportsontheweb.net/dell_t5500_bios_setup.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/jipawil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450876/normal_60551e81b7a20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471683/normal_601c8fab2cb71.pdfIn PDF document text
    • http://posadukik.getenjoyment.net/93151190428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452382/normal_5ff064fd5f6ca.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/novipaliwid/spanish_english_dictionary_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/best_website_template_builder_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b45f0c0-3dc4-47f1-843e-35263692887b/28349039861.pdfIn PDF document text
    • https://s3.amazonaws.com/zemunomipazikez/54109799290.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea5e4b07-8b93-4034-b5db-18e601f386cc/firije.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/sabigafawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143795c4-be45-46c4-b1a0-12e943cd78b2/do_walmart_cashiers_get_drug_tested_2020.pdfIn PDF document text
    • https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_e6a2da2a98f1434d99013cc6638fbb4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d54148-44fa-4a72-a8a1-ef46f1125997/new_gaggia_classic_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb60fc25-2df6-4ba4-abea-9741f2f9308c/xowufijevulerobuxegajer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19672854-6a01-4317-bdbd-c92aa2f83074/rayne_water_softener_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63430c8e-442e-4dae-9391-11f552fae8dc/76690514762.pdfIn PDF document text
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_6608f9a2363d4dd39d22200524349ab7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/moduluzuxikari/bbmp_trade_license_application_form.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_off0000fc24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC24 5376 bytes
SHA-256: 75acacfef87a512e68d0e2d00b0a2a61850acc5c7833a8497cd448a0b4127426
font_01_sfnt_off00010e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E70 10944 bytes
SHA-256: 4d43b493980ae2e7e5060e127081c1e08a5ff015078974798fa44e465b39028d

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