Malicious PDF — malware analysis report

Static analysis result for SHA-256 806b49a27a154f27…

MALICIOUS

PDF

68.8 KB Created: 2021-01-06 06:05:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 09976769df99089c296538ffab6150e2 SHA-1: 3f41972d772c0aa2eaa816c3cba231c00f29a7f9 SHA-256: 806b49a27a154f27163ddb7b05362e8c413f7634b67a6e5488d360b96205db10
126 Risk Score

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 0.9997

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 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://traffking.ru/aws?utm_term=play+bejeweled+free+no PDF link annotation
    • https://cdn.sqhk.co/kelopifagisu/ghijjhj/steam_tools_mobile_app_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418558/normal_5fe22b59378ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f99ef336e40e.pdfIn PDF document text
    • https://jobavoxiduru.weebly.com/uploads/1/3/4/7/134722818/177752.pdfIn PDF document text
    • https://zosupexaduj.weebly.com/uploads/1/3/0/7/130738593/getegugo_fotatogi_levinow.pdfIn PDF document text
    • https://sizomejuxitiz.weebly.com/uploads/1/3/4/7/134748976/xavet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386836/normal_5fa5dcac4ce2c.pdfIn PDF document text
    • https://cdn.sqhk.co/menaleratupo/lS9ifDQ/2285404994.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478658/normal_5fabbc1a7493b.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/ronusesokowagu_kemoxusaxa_gemejabuwul_luzabufegapix.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/2a713442-7e6a-4cc9-b4bc-ada4a99642af/que_es_ingestion_digestion_absorcion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34e774b9-afa3-434d-8054-da25cad1983d/waves_tune_ableton_live.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_off0000d0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B2 5132 bytes
SHA-256: 4ea7cd8353f8cdeeaa3386132507c9e8f1dadea559f7635307852339cd614479
font_01_sfnt_off0000e252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE252 10648 bytes
SHA-256: 8a00348f159af51091489c3673b0871a62d709c740521fa768b6a800ba9fff86