Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7104790cc4abb1a…

MALICIOUS

PDF

73.3 KB Created: 2020-11-10 05:54:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f817d1b6b307d251c3ff69f0c80dc829 SHA-1: 91f096771bf88ba72a75b7583be30dc0bc0540bc SHA-256: b7104790cc4abb1a6420a4bda113b2750f5afee790bf33938ebe81dae3a316fb
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 0.9998

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 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://trafftec.ru/strik?keyword=december+2020+weather+predictions+for+florida PDF link annotation
    • https://maxuvejalova.weebly.com/uploads/1/3/4/2/134265339/lojiweguwine_volezedobepivom.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/1613166.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/xatojem/86921578130.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/duzibu.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/gypsy_wagon_for_sale_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/bruhn_analysis_and_design_of_aircraft_structures.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e12de83-b616-4468-942c-33c8bad66b22/zuwobabelefipemo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17561582-40e1-4806-8164-98a50984855d/tufif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fab07ae-7e20-41a8-b4fa-2b957b1d4f78/tabela_de_medida_de_oleo_de_bengala_de_motos_honda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56258b35-4fd2-48a8-8f14-14ef14e36ae7/titimiguritotutawupododa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b90535af-e170-44fa-8ace-e75adb6bafc6/pidivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c11ed54-a5c5-4643-ae76-c2dbc1f38019/nerf_double_strike_mod_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22bbc673-dd90-48f9-b933-3fbcc34b5642/nudimo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acb4145e-1702-409c-bc72-4a29b7ec3fe1/famobijopuguxamolured.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

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC93 5900 bytes
SHA-256: a487d75f06a0abd25d6872d4dcf904221b4fd83ef98b4927d3e5a78c60405bda
font_01_sfnt_off0000f08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF08B 11040 bytes
SHA-256: 30951f3ddfb2dfb073219cb80b72a3fff22cc2e570ec19f7bad977aa12b73649

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