Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e98c4ddd0e431e2…

MALICIOUS

PDF

64.0 KB Created: 2020-12-16 16:08:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: b591bd4689cfc3f35ed754db8564e898 SHA-1: 53269ac97413d61578b1dc4c8ac57c86fa5d11d9 SHA-256: 1e98c4ddd0e431e295131c06cc3bb32cc36682f45d0b012ec1486c07db0305fd
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://cctraff.ru/strik?utm_term=life+cycle+of+a+robin+video'. 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. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

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://cctraff.ru/strik?utm_term=life+cycle+of+a+robin+video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374185/normal_5f907a11f096a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476275/normal_5fd612a4dc63d.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/voxazedisula/solosatimajewagutefodi.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/8365248212.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/all_beyblade_games_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce9f7ef127c57ce14fe504/t/5fd65c01e5ac582896214254/1607883778009/basement_game_full_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/jurnal_anabolisme.pdfIn PDF document text
    • https://s3.amazonaws.com/wukara/vijusimar.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/s_blend_worksheets_for_speech_therapy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53007495-80b6-4827-a0e1-29d2e9076301/letter_ii_worksheet_for_kindergarten.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf6511173fb5383b9a5bec/1606378770781/gudesisedi.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_off0000bf05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF05 5080 bytes
SHA-256: 566aec46d22e41d545f2b076570f882911b56b0dc4d8d51ef6b42b5191996871
font_01_sfnt_off0000d071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD071 10468 bytes
SHA-256: dc40314c7f9aa9dab685a50965c04ce975f307c3cbb88a231b237ced6ba440ec

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