Malicious PDF — malware analysis report

Static analysis result for SHA-256 85175d141c8c28d3…

MALICIOUS

PDF

76.1 KB Created: 2021-05-02 03:33:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5a8803e3ce574b900e1513b3f6880947 SHA-1: 212558e0cd26ca3c4fe4fde7cc81f4032f5eb725 SHA-256: 85175d141c8c28d3973d139562971059e4165e8e025df6ac8ce25b1ffb0beee6
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of a malicious URL suggests the document is designed to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/strik?utm_term=but+if+you+love+me+don%2527t+let+go PDF link annotation
    • http://italia-doc.fun/lomevepuporubesag4znry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483608/normal_5fdbc33c9bc16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_6048a126eb505.pdfIn PDF document text
    • http://bigowet.xyz/81371921303tijy4.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/vhfheie/lubaminalutom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_601af4aa360cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500882/normal_6036020d68bc6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_5ff1246771256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501361/normal_6044755b8f785.pdfIn PDF document text
    • https://cdn.sqhk.co/busumodofu/iUiahMN/9977213699.pdfIn PDF document text
    • http://getyourcredit.info/english_hd_movies_free_for_mobilehimtv.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/bokexizometun/live_weather_report_houston_tx.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/job_decline_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/wopat.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/noun_form_of_word_anticipate.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagobomap/kifutiderasogewusus.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/logiciel_dinstallation_hp_deskjet_3050a_all-in-one_j611_series.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/wigudepaxawebifu.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_off0000ece6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 4988 bytes
SHA-256: 5a16791ae08e1f57a03c1887b5b586c916f827869c20e270a1dea6de4eda7dae
font_01_sfnt_off0000fdf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF0 10964 bytes
SHA-256: a8ecb75694e26911ea9485e2a4579154c2db70061489b2f0c28b0646346a7c52

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