Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec6b0e0697ea3fa4…

MALICIOUS

PDF

76.9 KB Created: 2021-05-03 16:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e55423629f70a2f3248f30c708ebfe3d SHA-1: 578930aff337ecc12aa172f24f9aa07cb1dc6226 SHA-256: ec6b0e0697ea3fa4980ebce8444e9a69caea7f9ed55d3a92004a1e5553b884c7
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 0.9998

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://baarspo.ru/strik?utm_term=what+is+the+best+ending+in+dark+souls+3 PDF link annotation
    • http://nelibagaxo.iblogger.org/23475987234.pdfIn PDF document text
    • https://cdn.sqhk.co/wefekoferu/tjeKihB/dusulutonusowapor.pdfIn PDF document text
    • https://noguvipeves.weebly.com/uploads/1/3/4/7/134717425/8419038.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/8966176.pdfIn PDF document text
    • http://saxumoru.iblogger.org/safety_meeting_topics_for_construction_sites.pdfIn PDF document text
    • https://bonesinidojesu.weebly.com/uploads/1/3/4/5/134591006/milomojedunim.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/dhfHhho/losuvixi.pdfIn PDF document text
    • https://cdn.sqhk.co/bumegukomuza/86f7jhn/peluvetefadogoponeni.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://denuvila.rf.gd/nursing_books_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/org._apache._kafka._streams_jar.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/kupemumewuxixazekig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1993e87b-e1a1-4930-9271-75503102a9a5/how_to_type_roman_numerals_on_iphone_keyboard.pdfIn PDF document text
    • http://fijudixisofuzat.rf.gd/craftsman_190cc_4-in-1_chipper_shredder_24_yard_vacuum_manual.pdfIn PDF document text
    • http://kuwademepekipil.epizy.com/ielts_test_sample_papers.pdfIn PDF document text
    • http://muvusibose.rf.gd/gevajomoteki.pdfIn PDF document text
    • http://jasisogurajis.rf.gd/86108136701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6ef8ffe-d3b5-49f0-9917-98225434c9bf/descriptive_predictive_and_prescriptive_analytics.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_off0000eda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA9 5468 bytes
SHA-256: dac3331df2e24aad2a9d7990fab62c6f0e7636d059238dbfa159a1a7286ac015
font_01_sfnt_off00010048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10048 11556 bytes
SHA-256: cc90a2f712df21ceea3b36a7705deb87c52e4da0f6102b61e5fa1233836b3393