Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf63353ec4b51488…

MALICIOUS

PDF

71.8 KB Created: 2021-02-13 03:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e2c56bbe5301c56cf04cb4386093dc84 SHA-1: 462d06a80319e4c4098240f9bf5b046e31a3b751 SHA-256: bf63353ec4b51488dcf5b6afb6d3fb265bfa4fd4a301db71310defc251cee2dc
94 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it redirects to known malicious infrastructure. The embedded URL 'https://yafferge.ru/wix?keyword=constitution+crossword+puzzle+basic+2' is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the malicious redirector strongly suggest an attempt to lure the user to a harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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://yafferge.ru/wix?keyword=constitution+crossword+puzzle+basic+2 In PDF document text
    • http://shoop-fg.ru/5639600920202g5u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5ff3e67997f8d.pdfIn PDF document text
    • http://batut.space/betulazagenaru149ml.pdfIn PDF document text
    • http://wixiziz.iblogger.org/nasal_endoscopy_report_format.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417645/normal_601a1f10eed4e.pdfIn PDF document text
    • http://vedice.ru/79826411529yavpr.pdfIn PDF document text
    • http://123dutch.com/text_animation_after_effects_free0uzq0.pdfIn PDF document text
    • http://sellforce.ru/73426717996mqt76.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/susonanezaj/22057351368.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/the_informant_movie_trailer.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/2876150645.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/vans_logo_wallpaper_android.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/87703173130.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/sartorius_cp225d_analytical_balance_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/25224804842.pdfIn PDF document text
    • http://foboganezebalo.rf.gd/candida_en_hombres.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/chac_mool_resumen.pdfIn PDF document text
    • https://s3.amazonaws.com/kizugokofo/html_bangla_book_free.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_off0000dcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFE 5388 bytes
SHA-256: 29da190719f7638a3dc419439a84b4d19c7294dbfffa1aa5b69addc158e5b52e
font_01_sfnt_off0000ef6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6A 10160 bytes
SHA-256: a57f6ffb15b704246741e734abb10353d4fb808dd481041e701283f09cf2fdd2

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