Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efe4e361a2e3afe…

MALICIOUS

PDF

76.9 KB Created: 2021-02-15 06:30:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ed42eac209c195f056dd3450876238f2 SHA-1: 199d54c374e6c2cfd3efe7eaa5e618d9e4210aaa SHA-256: 5efe4e361a2e3afee06ce4f7e50050ed57c7d5b8fddb6ffcf261c1147b445dd6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a suspicious domain, likely used for phishing or to download further malicious content. The document body, though heavily obfuscated, suggests a lure related to a 'declaration of conformity'. No scripts were extracted, but the presence of external URIs and the overall detection suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/aws?utm_term=dichiarazione+di+conformit%25C3%25A0+in+inglese+wordreference PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451544/normal_6008c123a7351.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404520/normal_5fcf4108bd9ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366973/normal_5fc779b03208f.pdfIn PDF document text
    • https://gilawidukawopux.weebly.com/uploads/1/3/2/7/132741225/nebiximake_zimina_zubemi_suturutuzuj.pdfIn PDF document text
    • http://auth02mobility.com/dhhs_guidelines_updatee0jd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_6029b22b5f75a.pdfIn PDF document text
    • http://logvoz.ru/retroarch_emulator_download_for_pc_32_bitinsif.pdfIn PDF document text
    • https://gavuwexis.weebly.com/uploads/1/3/4/7/134772394/lizoleput-mawojabatume-dixonogebuwi-bekanevesadake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_6015b99d2101d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_600e7a919fb4c.pdfIn PDF document text
    • https://mogivara.weebly.com/uploads/1/3/2/7/132712472/9cda19c4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368471/normal_5ff92f7e2593c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://lanikudawojag.rf.gd/air_force_meritorious_service_medal_citation_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/botines_tacon_plataforma_mujer.pdfIn PDF document text
    • https://s3.amazonaws.com/wovugi/aquos_ga935wjsa_remote_manual.pdfIn PDF document text
    • http://zatojigetafugud.epizy.com/72375607205.pdfIn PDF document text
    • http://sisadeb.rf.gd/pillars_of_eternity_poradnik_chomikuj.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/95111597586.pdfIn PDF document text
    • http://bameromaxaw.epizy.com/22813865453.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2E 5596 bytes
SHA-256: ff8aaa1218527f27d75608d7d96f74590e8f2dc328ee79ca16d532731be086fd
font_01_sfnt_off0000f090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF090 11348 bytes
SHA-256: 37b747fe2447a8ed128c371459676c65819ba35a7f53af9b3ea08ba3e58f6c73
font_02_sfnt_off00011570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11570 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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