Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec42c8a0dcf5f80…

MALICIOUS

PDF

45.6 KB Created: 2020-11-05 16:48:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3781f775b1d36c764fa86d68e641190f SHA-1: d7a0e40c6ccf3a051b37e9a680ff022cc0a96b04 SHA-256: 7ec42c8a0dcf5f80fc17d440668bc978c21e4f18c590245ee759448efd542ebe
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/aws?keyword=ashley+furniture+complaints In PDF document text
    • https://tuvomirunasoz.weebly.com/uploads/1/3/4/3/134324776/xibuxosiloxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405459/normal_5f97b1cccb7cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f99ba4bb0f0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5f961aa87dfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8965633a9af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379960/normal_5f8d5588b33bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5f9124b1872b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383702/normal_5fa3cd864bced.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392474/normal_5fa3de20d9133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379841/normal_5f8bedddcea3d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8effb862-fa41-4ca3-86e3-bde5581f420e/area_of_lower_48.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c489ebd-d87a-489f-82f1-be492790cc16/wisupabekulanagemupupikup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f8dcd70-ff4f-4245-ba49-2c67b2fc54c2/araby_theme_sparknotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe8c679c-70aa-46ef-a5d8-5584564ced42/81538864933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/133a88e8-3846-4636-97bd-7ac40ddccf1e/devifemus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1c1518-6654-4b47-9fba-b7a5bb9ac242/28529606343.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_off000065a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A6 5228 bytes
SHA-256: bfc393253f33854c2572e358dd2e75f487a08e1fbab1155289bf342a844de01d
font_01_sfnt_off0000773c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 10668 bytes
SHA-256: bb69d097d6b6b1ae5ad00859152c01cd61ee2efa3e682a231676d5fabf7a260a
font_02_sfnt_off00009b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B71 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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