Malicious PDF — malware analysis report

Static analysis result for SHA-256 62dfa547a96a7261…

MALICIOUS

PDF

39.8 KB Created: 2020-11-06 23:26:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 391f5bd92d687b668c213bf80945cdad SHA-1: 7c65f98faea327570d6e04040a862ea4495f12db SHA-256: 62dfa547a96a72611276b2415c933ee0a469c61c9ffad85f0bdb9c890dbfd911
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?keyword=volume+of+a+triangular+pyramid+worksheet In PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/wixigasovigemoximete.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/6cbebe7c-0b43-4889-bd43-c463131a530d/dc_vendor_portal_dc.pdfIn PDF document text
    • https://wepizitu.files.wordpress.com/2020/11/66331733151.pdfIn PDF document text
    • https://givolajokofe.files.wordpress.com/2020/11/japatewajaliwififu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e117f0dd-777e-491e-af7e-df26aba14f87/luzejowanosiraxazu.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/estadistica_para_administracion_y_economia_anderson_11_edicion_solucionario.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0260643-df05-45fe-819d-e9368e41b461/vumefedizirore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1110aea-8f60-42cb-b95b-57bca4285c57/77946190643.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0d49821-8d18-4474-9825-d73bbc03931b/women_s_bathing_suit_short_bottoms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b430462-e4e6-4d51-884f-f90c7d91142f/d_d_5e_background_far_traveler.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/43206917152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf19843-a80c-4d28-8201-f1349e9f3b6e/mummy_s_mask_player_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/ayodhya_city_of_faith_city_of_discord.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000519f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x519F 1812 bytes
SHA-256: 29c30f59ed6ec20768a9a4087382c9d167518d856ee10e9111f7b7b620648604
font_01_sfnt_off00005a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A83 5676 bytes
SHA-256: 79810f20d24dde7e862017b29b87f5d08428704abb535629060511141dc84eb4
font_02_sfnt_off00006dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCD 10776 bytes
SHA-256: 918f05710f2bcbfb71d247795fbd7c352509f7da92f46af857a262b0a320c33f

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