Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c098fafdbad49d7…

MALICIOUS

PDF

67.1 KB Created: 2020-12-01 03:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cf37c7bcbe29b45d214d92dd73322fdf SHA-1: 028376ab0de50d638eb132701e8ea11b9eca1f13 SHA-256: 6c098fafdbad49d736db61b389f4f79727fcb4cbfc490e6db8225593ac4fc8d8
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'traffset.ru', which is also listed as an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness, classifying it as a phishing trojan. The document body, though heavily obfuscated, contains text related to 'Suny albany academic calendar fall 2019', suggesting a lure to trick users into clicking the malicious link.

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
  • 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://traffset.ru/strik?utm_term=suny+albany+academic+calendar+fall+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f8745fa0465c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443588/normal_5fa195cc635b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366956/normal_5f97266ba647a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_5fa7e17938b0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465269/normal_5faabb29acafd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc10ac260f2895dc1e8a19d/t/5fc1c12f4e98326c0251b0e1/1606533424200/microbiology_dilution_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5a4e30f-3583-4d97-bf7d-556fc4d01a79/inscribed_circle_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94721066-53a6-4c63-b24a-a09ce59e9830/fodivezekudomezibesilawo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc12a1c9698b02c7f224c6f/t/5fc27bf59d79364840ddec53/1606581238063/pipasowovurexelike.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f02d8d9-1cc3-4cc3-a79c-446a74576099/kambakkht_ishq_full_movie_download_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf59743570fb44d1f9e1eb/1606375807800/37708712814.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/many_much_few_little_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0eac55bcb0228a2828fa5/t/5fc311133f75b16643394baa/1606619413600/ternary_ionic_compounds_worksheet_a_side_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc13b47c14dfd36fef3b64a/t/5fc5612f6457125654f090f4/1606770991760/bible_quiz_questions_and_answers_from_matthew_in_tamil.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4e99f3de5e49b55ab8f9/1606373018561/laptop_hard_shell_case_for_dell.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_off0000c726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC726 5816 bytes
SHA-256: 70fb288d2d5cadce6960b16da81ff329171565d9cecee4131d31c27973b8d7e0
font_01_sfnt_off0000daec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEC 10556 bytes
SHA-256: 78dadc836dc2c9eb672c070f4a10f9b86b03a51e7de8bb2e4282ab5386d49be1

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