Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb04b8163957115…

MALICIOUS

PDF

82.5 KB Created: 2021-02-19 21:45:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 632e784bf72a34150468eb18c78e17b2 SHA-1: 0f3f3a43cb94611b2387bf286dc5943c1cab3aae SHA-256: dcb04b8163957115e8e59faa51d6baf6a296ea7bd57f47df2dfa5398d7f42f48
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, one of which is directly referenced in the document's metadata, suggesting a lure to external malicious content. While no scripts were explicitly extracted, the PDF_URI heuristic indicates the presence of external links, which are often used to download further payloads or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/123?utm_term=your+love+never+fails+never+gives+up+ukulele+chords PDF link annotation
    • https://cdn.sqhk.co/zikegasenar/jhiiicH/20386355245.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/mekolibugiliwijefot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5fe83c2a11813.pdfIn PDF document text
    • https://tewetakejuduz.weebly.com/uploads/1/3/2/7/132740850/nuxulike_dezur.pdfIn PDF document text
    • http://hh666o.site/fuxasabdqz08.pdfIn PDF document text
    • https://topudamix.weebly.com/uploads/1/3/4/5/134581811/raxodikajifejijogu.pdfIn PDF document text
    • https://vutakajar.weebly.com/uploads/1/3/4/8/134896426/bakubepo_riwupaxosulo_zofuvabege_meronisadiza.pdfIn PDF document text
    • http://voirop.xyz/fesojidobefyz.pdfIn PDF document text
    • http://veronaital.space/44291319173oxgwo.pdfIn PDF document text
    • http://mmeueue.space/hello_guitar_chords0zyjw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409107/normal_5ff95e7fd4a74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_600cebd1a2a7b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405208/normal_5fef012b29c29.pdfIn PDF document text
    • http://copyright-services-us.com/journal_entries_practice_questions_and_answersqefaf.pdfIn PDF document text
    • https://vefoduwuwi.weebly.com/uploads/1/3/4/9/134902927/melonula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/zexozavo/aromatic_antiaromatic_nonaromatic.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/bomb_it_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/barbell_medicine_the_bridge.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/88941536315.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE428 6488 bytes
SHA-256: 7189eb1f2b79b997a7202adf4fc3a5363d9c88459230375c94de3083faf1df66
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 5504 bytes
SHA-256: 0f3884d8da38d6a4177b0508eb30c56b9404f4f8ea86cd9fb03ca65ee32ab73c
font_02_sfnt_off00010cb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB5 11212 bytes
SHA-256: 8fa7579067e72963b521826840b38ccab8fa3c246e5ddc2b830f202083b4c067
font_03_sfnt_off000131ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131EE 2380 bytes
SHA-256: 82159afb3aebdc5bb44b5c4a1a65b218b512fa420d3ac27c6c38a8c462e0a589

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