Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b1da89d53afeec6…

MALICIOUS

PDF

68.0 KB Created: 2020-12-22 21:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4890adc2d214efb9233f33366c625456 SHA-1: cb43185585106bf72ca66dcd8c045d08b834e6ce SHA-256: 5b1da89d53afeec63137a8000928efb6f830f07f2d6e4bf53b31f492b3b1e6b9
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=jindosh+riddle+answer+key'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to lure 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
  • 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=jindosh+riddle+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413866/normal_5fad59a9a905c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f8d23ecac13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_5fa4ff991d55d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_5fa62e1a81b18.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/ea1ea1a5-8bea-475a-b397-43277a0cab11/15093097054.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/formulario_de_caida_libre_y_tiro_vertical.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1129368612547ed5f20ea/t/5fc243031972c46e3ce8f39e/1606566659727/oklahoma_county_warrant_search.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdea7f851e6b539731cab78/t/5fdf62fb7f4e6a336733ed68/1608475387656/us_home_phone_number_format.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fced398eec7ca5c3650c22c/t/5fd671d1154d727871ee00ee/1607889362804/kabololelubo.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/tafsir_al_quran_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/angles_in_polygons_gcse_exam_questions_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe049ba6fe27c47febdc1f3/t/5fe106380d39233d64e5da17/1608582712663/82556833527.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/jofaneru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fdc7b8-783a-4f2a-b6c5-1a4ef5374d11/48821491365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97ea852d-6645-4699-9c3f-34f2f648dff4/wofejadiratoveweluz.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_off0000ce9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE9B 5160 bytes
SHA-256: 101267cb9be5ae307f3508defd322adb2fe08c1d86c9ca24c07ce06427691ffd
font_01_sfnt_off0000e033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE033 10196 bytes
SHA-256: cf9075a5669174c2340bf9ec9619a3d42c41977b3a5d62e7f3dabe097b0313b6

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