Malicious PDF — malware analysis report

Static analysis result for SHA-256 d95d6f069ac222dd…

MALICIOUS

PDF

46.1 KB Created: 2020-10-17 04:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b0610f7fd5d835354fedde828d4e4e59 SHA-1: 4290be34c07e326c458a127b5331ff4fd1ca786a SHA-256: d95d6f069ac222dd162bca666355df7e8852a9d3a99ac9691464d7481b6d5513
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://gettraff.ru/123?keyword=amsler+grid+chart+pdf In PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/burixuvojux.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/gepukaniteri-jisedome.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/18c46ddaf0eb7.pdfIn PDF document text
    • https://pudukodup.weebly.com/uploads/1/3/1/4/131407572/rebidosobazeroniz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_5f8a421c89add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f8a1d069831a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f87572c2a2d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8743a107ea5.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/pesegisekojen.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/zanabugobawere.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870e74c37df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f8a2c1d8b174.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f89d3226ebbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f88884a23f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375700/normal_5f89718747968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8716979df90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f87bcf8bc98a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f92e98311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375699/normal_5f899a875f38b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00007481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7481 5556 bytes
SHA-256: 9714a7d95f22d2e285932e6bd2d8a2dacef51edaf090284a4a0b63c182277117
font_01_sfnt_off00008738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8738 10536 bytes
SHA-256: 6fc5efab33a9b266e2e4f4ec7e89630d5bd82f07ad34e0a59c27e89035ab3994

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