Malicious PDF — malware analysis report

Static analysis result for SHA-256 3974b9e71ee57d87…

MALICIOUS

PDF

35.2 KB Created: 2020-10-27 09:16:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 2a5be8d28f17416036fbac3bd3531ab0 SHA-1: cc9760a5c15b4af3caba489db75830ad16c600a1 SHA-256: 3974b9e71ee57d8745754538a93e1406f0b6be650bcec4a45e9de67399516e13
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.me/pify?keyword=pa+ebt+card+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420230/normal_5f974e827218f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f93a9d8b1997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f8ee90b4c37b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389084/normal_5f9132bf0dbda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5f976e530f896.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375357/normal_5f92018ac9e93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404757/normal_5f9783af23754.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/mojimali.pdfIn PDF document text
    • https://siregudak.weebly.com/uploads/1/3/0/7/130738759/5797277.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/5d0410.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000050aa.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000050aa.bin)
    • https://s3.amazonaws.com/pazifetanegapu/9769606694.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/naxugunet.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/mamopatozebotezalosiwefu.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/prueba_de_procalcitonina.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/palekiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/all_formula_list_of_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/468ed4d8-3274-4165-bd5b-0279f7656b21/27552533943.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a921861f-c0fb-4bbd-be81-ab00a0db7bb5/63934668155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721e497f-68f1-4660-9914-8dd1526bed18/corel_draw_x5_free_download_with_key.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 extracted file (font_00_sfnt_off000050aa.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50AA 5016 bytes
SHA-256: d39d563d83b688989b67498ca27fae4fd4f2e2aa80fdc381b4c3d89488366cc5
font_01_sfnt_off00006193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6193 8852 bytes
SHA-256: df947781126340edbe27d22d7925bb0792d1a812e39117176c535448483244ef