Malicious PDF — malware analysis report

Static analysis result for SHA-256 c65d680e72d9b81a…

MALICIOUS

PDF

78.6 KB Created: 2021-03-03 03:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5ddbb5e4791b61e9600190d4b96318aa SHA-1: 9e58140109457ef230a5e66eb357a00ef0f62cc2 SHA-256: c65d680e72d9b81aac90f99c92a12d547b4a7d3350f7a925080fbb25033867c5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a suspicious domain, masquerading as a link to an academic paper. This technique is commonly used in phishing campaigns to trick users into visiting malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for credential harvesting or malware delivery.

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://kuzutuzo.ru/strik?utm_term=research+design+john+creswell+5th+edition+pdf PDF link annotation
    • http://ligumexijigab.getenjoyment.net/essay_for_grade_6_students.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424036/normal_5fed13d67f2ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388413/normal_5ff2bf2140abb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419433/normal_5fd7cd7acdeda.pdfIn PDF document text
    • http://pazifelurup.medianewsonline.com/95460058665.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371536/normal_6031235b7cdb6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366057/normal_600915032125b.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/36126996391.pdfIn PDF document text
    • https://cdn.sqhk.co/mudemodox/aFiaJuY/kasipikiwisaluvo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_5fda807c39b55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5ffbd3e616978.pdfIn PDF document text
    • https://cdn.sqhk.co/takodabu/ghIhfie/tetufatisojalefagiwigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_601b703335937.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/jarawaxanivu/american_islamophobia_khaled_beydoun.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/synaptic_package_manager_for_ubuntu_16._04.pdfIn PDF document text
    • https://s3.amazonaws.com/lowuwofuxali/asma_scielo.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/30681231679.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/full_form_of_miit.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzakob/les_choristes_pepinot_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/jasetabopalavegepibegabaf.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/gibamebuwevabuwarulidazam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 5716 bytes
SHA-256: 458dbc1dc15c04e3eb6a288552812a3b3ade886671d3279ac93de18ea70fc2d1
font_01_sfnt_off0000f2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EF 10936 bytes
SHA-256: 9889263ab163f4cc4d76adccd9033133419a52feaa6bba372d088f4c4141aad9
font_02_sfnt_off000117fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FA 16084 bytes
SHA-256: 3dd6252bb62cdcc21e2b76bdeb68ba6c8db9c2d08edae94764e010183c5b1848

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