Malicious PDF — malware analysis report

Static analysis result for SHA-256 3887676cae6b4787…

MALICIOUS

PDF

39.6 KB Created: 2020-11-09 12:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 8cf980c8c5011a4fe900d3e11c35d7b4 SHA-1: f2f50806de8a5e38976102f30df97196b978582f SHA-256: 3887676cae6b4787b9af117496d3f1ad3cee618f740a4bd95d0611a13a3e377e
84 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://trafffi.ru/aws?keyword=minecraft+unblocked+games+666+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373281/normal_5fa786d463082.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5fa46dd8618ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f897c7f65179.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5fa44529e9153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465709/normal_5fa37cada6938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f875f17d763c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402740/normal_5f94a53cdef3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fa5a2cea8713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410731/normal_5f9d26862fe29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f875af4e50fb.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/f7e82f3f-5f13-453f-a1e4-29dcd5eb8092/toxoruperiluxugoxiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6497bc6-3a9a-412c-be6c-08f6ac27d124/govel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe0d986-d564-4578-8521-d17ccc2c43cf/nesobizixanewotodaxuko.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_off00005c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C1F 5796 bytes
SHA-256: 513563a5c949d445f9a5ab1aec37deddac048b1fb1d93eebdfd79f8bc1369df4
font_01_sfnt_off00006fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE2 9840 bytes
SHA-256: 19c819aa15ef7d62f6dda52038708db538e52413e409d6cde782b9707e5b287a