Malicious PDF — malware analysis report

Static analysis result for SHA-256 abcfbcd49e96083b…

MALICIOUS

PDF

43.8 KB Created: 2020-10-16 06:35:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c9818099e7e79d5cd860cc4527f00f86 SHA-1: 3a1051d178252b1ea5fc5c92c8714e4f1dfd3f03 SHA-256: abcfbcd49e96083ba9fe42839d73dacafcbcb45fccb2c761e707ae9dcf125c60
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/123?keyword=tetra+pak+pasteurizer+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f889247210da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f86f409ad848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f88d0b036c42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365636/normal_5f86fad31edb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5f88ae9777a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f88f77b609a1.pdfIn PDF document text
    • https://site-1039311.mozfiles.com/files/1039311/guvijolorititavifebusev.pdfIn PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/70862950882.pdfIn PDF document text
    • https://site-1037828.mozfiles.com/files/1037828/bodosabewafunasovip.pdfIn PDF document text
    • https://site-1041413.mozfiles.com/files/1041413/delakodikigoginebojugu.pdfIn PDF document text
    • https://site-1041679.mozfiles.com/files/1041679/speech_notes_apk_app.pdfIn PDF document text
    • https://site-1042629.mozfiles.com/files/1042629/paper_origami_star_box_instructions.pdfIn PDF document text
    • https://site-1042196.mozfiles.com/files/1042196/96329319725.pdfIn PDF document text
    • https://site-1039963.mozfiles.com/files/1039963/50508900413.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/97383995586.pdfIn PDF document text
    • https://site-1037011.mozfiles.com/files/1037011/6720656216.pdfIn PDF document text
    • https://site-1041079.mozfiles.com/files/1041079/fewejisuvodasokupopino.pdfIn PDF document text
    • https://site-1039517.mozfiles.com/files/1039517/81566982885.pdfIn PDF document text
    • https://site-1042978.mozfiles.com/files/1042978/fewagawiketinugakibena.pdfIn PDF document text
    • https://site-1040280.mozfiles.com/files/1040280/sawigejoluzawub.pdfIn PDF document text
    • https://site-1039727.mozfiles.com/files/1039727/19837492062.pdfIn PDF document text
    • https://site-1043613.mozfiles.com/files/1043613/zapugizalapibajuwe.pdfIn PDF document text
    • https://site-1039409.mozfiles.com/files/1039409/tabosedupabagofol.pdfIn PDF document text
    • https://site-1040396.mozfiles.com/files/1040396/bujuwajubuganasubu.pdfIn PDF document text
    • https://site-1045384.mozfiles.com/files/1045384/78208990553.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006cf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF2 5068 bytes
SHA-256: 7cef8e968137cf14202738fbe6e0960619f66981a546881e807f5dd297959fa3
font_01_sfnt_off00007e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E47 10268 bytes
SHA-256: 7c2352f0a2fcf8eaef3fcff81a9584b18426f7bf2862f6dea3d3831106d0ffc6

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