Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d45c33d0e84597b…

MALICIOUS

PDF

165.3 KB Created: 2021-04-01 23:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0aa991956f09ab8a6f5ee6a3a6244bba SHA-1: 17c09a70c715e66d366d030e5ad4ff427eb988a1 SHA-256: 8d45c33d0e84597b1bdc678e6fb3e4307758f7239b344fa371803fe237fce5a3
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://baarspo.ru/award?keyword=solo+amparito+roca+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4469633/normal_6035811c376b3.pdfIn PDF document text
    • http://gufelujoziwuki.iblogger.org/stephen_hawking_theory_of_everything_equation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484641/normal_600c9b19740b4.pdfIn PDF document text
    • http://bodurum.iblogger.org/pibupe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447097/normal_60556f8c68317.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/dowadotiju/pibigidesofezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fb45911-5ca2-4ad3-bbf5-d28a16f302e7/electrical_engineering_technology_salary_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/why_does_my_samsung_washer_leak_water.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_e8b340939d2b41ccaa4f2d3dbfc747e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zukogi/pulp_fiction_theme_piano_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25dba317-5700-4790-bb3a-e33f527ccbed/unequal_childhoods_class_race_and_family_life_annette_lareau.pdfIn PDF document text
    • http://viminug.epizy.com/35511255247.pdfIn PDF document text
    • http://nesaketesimifu.rf.gd/rizojurixojusovusigak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75db4324-b487-4e54-82cd-2c5ba14ca4db/rerapuxebomid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/121b0654-f886-4164-a422-2de496f4fc94/41111947373.pdfIn PDF document text
    • https://5c3e38fa-bf2d-4cda-bfdc-19e9a39f2227.filesusr.com/ugd/b3ada4_0dda1eef92154520909ee7fb1666c0a4.pdf?index=trueIn PDF document text
    • https://48bf584d-d56c-45cf-b4f3-c1c05dce5274.filesusr.com/ugd/3f4b99_71fe19ecdab64022ab6265560c4190ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wefadep/topuka.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/31062987666.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_d04566c169a040189cc71d6211288b37.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/2019_half_page_monthly_calendar_template.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_off00025119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25119 5228 bytes
SHA-256: b9cffe77f105f30925f9d7e81332e04092dbdca703ce1d15bf2fadafef740eb8
font_01_sfnt_off000262cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x262CC 10820 bytes
SHA-256: d57090311e5e77c13680d1d7b92f45b464d221f1d96a4dd210712cfe3927cee5

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