Malicious PDF — malware analysis report

Static analysis result for SHA-256 92761521b2519e81…

MALICIOUS

PDF

125.0 KB Created: 2020-12-11 22:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 853fa79ef05acb12621f05650148e3c6 SHA-1: 5077a64e0282306d76a6716aa91a97aeaec94aee SHA-256: 92761521b2519e81b4e7fb895be6fc5ab844b98ecd34b81dc53684f7d33280bd
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that points to a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to download a secondary payload. No scripts were extracted, but the presence of a malicious URL is a high-priority indicator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/strik?utm_term=bellefonte+area+high+school+mascot In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_5f925d455f9ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8731d14c332.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462727/normal_5faf56083f7cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451556/normal_5fccf576bda81.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/fasomusogapovi/kimoxalogin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a12705fd-660b-4e5b-a723-26d335e4b7bc/the_great_indian_diet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/cosmic_perspective_9th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/53556643582.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/buwufikomexozaru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18de7affbf90a66ef1cd7/t/5fc597d43485235c8686f75f/1606784994749/2020_reading_teks.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/discussion_research_paper_example.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/49779450051.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/fire_emblem_nemesis_stats.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf65f118e72e5fdbcfd643/1606378993776/onstar_manual.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_off0001af75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF75 5344 bytes
SHA-256: 4c45e9bcc877ee608e44ba3d36b409f4c2ab9ded46091ad30267f0458ad8577f
font_01_sfnt_off0001c180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C180 10852 bytes
SHA-256: 4c9b8a8529f8d68b93b71e1928b0615fbafac816daed4db875bafbe7bcf4b907

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