Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b81d16feddb7029…

MALICIOUS

PDF

83.0 KB Created: 2021-04-08 00:54:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 5eb302636654f884724edff0ecf9caa1 SHA-1: 88db94c2f8136fe1571f904f6a5be2ca66296ba8 SHA-256: 7b81d16feddb7029c8dad01a376127f954a58d0042a51d8bec08b1b33b29f734
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=linksys+wifi+extender+ac1200+max+setup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410731/normal_60551a825b03d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492253/normal_602c0a1b047f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468261/normal_600efea8474f3.pdfIn PDF document text
    • https://cdn.sqhk.co/nabotogemobe/YuV2jdO/44328902873.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/ihgdjfL/tip_top_meats_dinner_menu.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/gimepuveloporalagowudab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491169/normal_5fd60c5ea0ee4.pdfIn PDF document text
    • http://matepiruzozu.iblogger.org/renowned_explorers_holy_grail_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/iijcHyg/sowiripogokuwepa.pdfIn PDF document text
    • https://cdn.sqhk.co/wolowivem/0LUnjar/48632414721.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/debiwelof/ceebook_neco_answer_net.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/gipelupiv.pdfIn PDF document text
    • http://wenibeliso.atwebpages.com/dialectic_of_enlightenment.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/firefox_offline_installer_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/51892731569.pdfIn PDF document text
    • https://s3.amazonaws.com/zopenave/wepejaluwilika.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/bovabigatobederefo.pdfIn PDF document text
    • http://pepiretivixu.epizy.com/lisejulufubepunatu.pdfIn PDF document text
    • http://zulojazivuvuk.epizy.com/love_percentage_calculator_free.pdfIn PDF document text
    • http://dosibaguluf.epizy.com/dietrich_bonhoeffer_life_together.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/complex_sql_queries_examples_with_answers.pdfIn PDF document text
    • http://fikelamizogu.myartsonline.com/zajiruse.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_off0000f6db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6DB 3968 bytes
SHA-256: 866d2638d75079aa8adbae6e1422ac5a682fd7d64a2f8c18dd3ea586caac0dcd
font_01_sfnt_off000104f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F4 5860 bytes
SHA-256: a3d350882a41931078b2918c24e3d19f3bc2e66a8fea0a9ac59490fce2fd938f
font_02_sfnt_off000118fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FA 10864 bytes
SHA-256: 98b0b80d29552c99f08e7c8a4ba03c38a80cc28fdc8546a4771f88bff9ca2848

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