Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c23adb624035353…

MALICIOUS

PDF

41.0 KB Created: 2020-10-15 14:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7f9227ed8e0b15ae09b07b1456595b21 SHA-1: e76354b31aea6a8562819aab579418ca6631708e SHA-256: 8c23adb624035353c011db0da6dafd72366afa302600910d9c71c10c7142ace3
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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?keyword=agenda+google+delen+android In PDF document text
    • https://site-1039498.mozfiles.com/files/1039498/du_battery_saver_2020_apk_download.pdfIn PDF document text
    • https://site-1039506.mozfiles.com/files/1039506/67913439312.pdfIn PDF document text
    • https://site-1039769.mozfiles.com/files/1039769/31604580328.pdfIn PDF document text
    • https://site-1048535.mozfiles.com/files/1048535/21964342638.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/6692480.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/77ae3b98251dfb.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/5711090.pdfIn PDF document text
    • https://site-1042670.mozfiles.com/files/1042670/sifidokametabopufetuvo.pdfIn PDF document text
    • https://site-1042188.mozfiles.com/files/1042188/vuradepufola.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/425c3339-c577-494e-876b-d66919f63577/zomupixerojowoxapokavevo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffe88807-75bd-4e43-8102-8fbdd3e0688e/52441223975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc8eab6-f91b-42d1-9fa6-57f0c4191798/30733303728.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/954a2891-0803-465c-8cbf-6dcc5b2ca86b/28564186727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c81568-414a-4748-b467-f44647b7c62a/zovikowo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad765824-5809-4f8e-9bd6-f4e944250bc3/xozuwoboxol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6925/8919/files/electrical_circuit_analysis_lab_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4948/3426/files/weather_merit_badge_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7046/2883/files/bogikubodatigolivunusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2697/9739/files/free_florida_driving_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/avast_license_key_until_2050.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_off000064f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 4804 bytes
SHA-256: 864d12606a25444ce6c9eefb2a00ac46985e86994e07000550fd4c370db00339
font_01_sfnt_off00007558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7558 9872 bytes
SHA-256: bbe174323519ac602caf86c336c1828186e6925c0f4a53c15bf20a356acd46b6

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