Malicious PDF — malware analysis report

Static analysis result for SHA-256 978cfe2b2e036c97…

MALICIOUS

PDF

45.6 KB Created: 2020-10-16 04:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c543e888f14320c0afd88ad73739911d SHA-1: 357131273209bf28182ebdeeb28a6d4088faac14 SHA-256: 978cfe2b2e036c9769b4a8f80be0c746dfec4d27c3a5c155132cd97e6494a39c
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://ggtraff.ru/123?keyword=copper+chimney+menu+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f88bbb4b161c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f872a46bc202.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9669/7768/files/57087576243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/4996/7527/files/70937307654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7412/0597/files/padepivula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7779/3960/files/bellsouth_walkie_talkie_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0676/9342/files/21792908401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8881/3461/files/26500221807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3671/5419/files/ladobetel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f73217-afca-4faf-a823-494f84f74db6/55622510393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6788c8f7-624b-43de-93bd-3dcd9c510c81/39975827270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848f6c25-514f-4554-8090-766b4013eb69/78121365007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f2fac0f-fd35-42fe-8ee4-3bf150eb0a4d/zuwirivosovujoxigonovaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf79df9e-fc1c-4e01-9e9a-9ae2590c783b/jefusukifosinudotabis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563155e1-58c1-4fbc-be35-2a62e7ed658e/jawasiragolijanetibolajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fbe780-be73-4183-97e8-0a328da5e28a/wukupozakimisufevomet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df178715-02c4-46fa-9f1b-504eebc1ede1/totulamopaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7c07996-314c-4511-8350-a313b71b807b/mowefilufujamo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162dc5b9-efe1-48c6-a0fb-a5b5aa92d3db/kexasilik.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_off00007680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7680 4980 bytes
SHA-256: 95a9eaebe4f11f77dc06d94d3c0341163aab6e6d9627a6c036d5c017cdca4ab3
font_01_sfnt_off00008750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8750 10028 bytes
SHA-256: 09dbc8790b7c95448c9db50eb72598543b412bf204dc7f53548cbe268ff644e4

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