Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a475595adb686f9…

MALICIOUS

PDF

65.8 KB Created: 2020-11-21 10:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0c9410b8b17e7d8a22321349d42f5508 SHA-1: c7cf7957f90570ca9bac367fa9f1b15d6b3b8763 SHA-256: 6a475595adb686f9af80c13a6449a8e12a7557ddd5b0bec4284f4bbaf37a3c09
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to educational content.

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://trafffi.ru/123?utm_term=ancient+india+lessons+for+middle+school PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387924/normal_5f9481fd72f37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377908/normal_5f9dc29f76a12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_5faf2cfbabe95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f86f651ce858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424689/normal_5f987af1b7cf6.pdfIn PDF document text
    • https://notaxivarem.weebly.com/uploads/1/3/4/6/134633458/gever_gadapufasiziz.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/tenunud/zexitapapekujetekera.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/313331490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bbde90e-5019-406c-a8a3-9b7eae0a6164/lafoguxexemitusosi.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/lidabew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fd1de1-f82a-4d84-8e61-fdadc5be001d/motocard_andorra_capacetes.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/dapidusijivibiridewugo.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/candlelight_carol_john_rutter_sheet_music.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_off0000c4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4BD 5248 bytes
SHA-256: 7b1fd6a21f32a430030b29fbeb10f9856bfd87c24244bef5d44d0bc399156b13
font_01_sfnt_off0000d66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD66A 10544 bytes
SHA-256: 67372844635abed65ce4e5f80384503e32e54488edbd0f096cfa2f35e343046d