Malicious PDF — malware analysis report

Static analysis result for SHA-256 a335046a78377664…

MALICIOUS

PDF

66.0 KB Created: 2021-02-01 04:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7534ccf95e2358e71d0f4755a351c22a SHA-1: 57b050d9d6d9297d8b9989ea3053f8f0bb1fabe4 SHA-256: a335046a783776641436b38470f240586a6dacf905d2de294d3ebee56fa58dc5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=color%20splash%20effect%20video In PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5fe659740f983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481515/normal_5fd884fbef368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379221/normal_5fee7b5b3c668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416802/normal_5fca4c8b8f7f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5fee02ddbed58.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/jbEBljg/34627105778.pdfIn PDF document text
    • http://wufutawolemipa.22web.org/freya_ridings_lost_without_you_piano_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/kewexezaviz/gcCiegg/95347817677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_5fe808779d2a9.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/lgeMigM/smash_mouth_covid_song.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404113/normal_5ff7b51e542ac.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tazomibege.epizy.com/leraboziwexilo.pdfIn PDF document text
    • http://wigezenefibi.epizy.com/assistive_touch_iphone_4.pdfIn PDF document text
    • http://faxogego.epizy.com/informal_letter_writing_examples_for_class_5.pdfIn PDF document text
    • http://joxumokuri.epizy.com/29684942626.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/ux_design_case_study_template.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/letter_c_tracing_worksheets.pdfIn PDF document text
    • http://vogizopenukese.epizy.com/wananijurelotaxetepona.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_off0000c5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5C6 5208 bytes
SHA-256: 8b7f2ad4b213d531caf5c3976ed1869d3f0160b9fb0ca366e2ea0101a3ecea7c
font_01_sfnt_off0000d77a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77A 10920 bytes
SHA-256: a9edca2476158e45b88dc690091200656911c13b3af7b7bb6b49ed3ed0e60880

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