Malicious PDF — malware analysis report

Static analysis result for SHA-256 2045351dc8917f83…

MALICIOUS

PDF

45.2 KB Created: 2020-11-06 12:03:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 1f9e0b78f10b702142c1f3c20f8a0ff6 SHA-1: 3c38bc1f7e8a18ffa3c3222646438e393578b48f SHA-256: 2045351dc8917f836d0b5ccc22dda53c26b4cbc1f9c6bf830c096e6a815e074d
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=california+physical+education+standards+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383924/normal_5f915fdeca408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405945/normal_5f9e92ba32d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5f9cdcf42ebe9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5f967acbb01af.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/vowibowafulora.pdfIn PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/1075470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f955791e5076.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421329/normal_5f9dcc9f5cbbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f8b33dfe0eae.pdfIn 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/b5f6d556-907d-45d2-b4bd-757355833702/lijusuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95cbaca9-ce64-445e-8a58-6776631da69c/23656042232.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/840db473-9bc6-4920-bdd3-28dc2b0233f8/tujumalofaveru.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/razor_e200_electric_scooter_owners_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f524cb0-05d3-4751-9c8e-6c9ef57d4606/diwojogitu.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_off00006f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F88 5732 bytes
SHA-256: 7422551d62e80b9971fe290e7f966dc271ebeb17c4dade7e92ea6750dae3bf4f
font_01_sfnt_off00008316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 10696 bytes
SHA-256: 1da60b62b2a65aebc1acd49e294dcb31b5c51c92a59e3327624c113e3d849d27