Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8207c5f9095eca…

MALICIOUS

PDF

65.8 KB Created: 2021-01-06 11:38:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 88e4e1e74317a254abe2c8fb6ac5a689 SHA-1: b7283b2cce3bef558711fcc4b84b6f80cdebfc77 SHA-256: 7e8207c5f9095ecaaf49c4c7b1b5f7db24c029fb3161ed472e35e685f8409fc0
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffine.ru/aws?utm_term=median+from+a+frequency+table+worksheet+tes'. This indicates the document's primary purpose is to lure the user to this malicious site. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a phishing or malware distribution attempt.

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
  • 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://traffine.ru/aws?utm_term=median+from+a+frequency+table+worksheet+tes In PDF document text
    • https://cdn.sqhk.co/lenawemijixe/PN2xThi/dragon_kirishima_x_dragon_reader_heat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5845375b-3789-474b-8838-54a522ae94eb/kitsap_lake_elementary_lunch_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/short_professional_bio_template_word.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/naruto_shippuden_episode.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/mozilla_firefox_67._0_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51e35de9-ac16-4236-ad95-55584795c3cb/91563697780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbc0ddd-f96d-40d9-91f9-e7a3fffbf6be/nobamaludotixezisewog.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/37981879361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31c646b8-f585-49d6-bd1d-e34b46af465d/lifamebu.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/sample_invoice_template_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/guidelines_for_blood_pressure_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e631c709-5519-4cac-8ba7-fdb2b2d14add/transformada_inversa_de_fourier_ejer.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_off0000c291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC291 5792 bytes
SHA-256: 1ad13b3257de35437d2361c4ab0d70856b015d4f2fa01f15ab849ee1cb3df1a5
font_01_sfnt_off0000d63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63F 10632 bytes
SHA-256: 23f4ad9902c279efaa1ba18d8b19f46d575cf65f7cb3fd64a9164e13c277a03f

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