Malicious PDF — malware analysis report

Static analysis result for SHA-256 175e6517d0c13e5a…

MALICIOUS

PDF

48.8 KB Created: 2020-10-28 20:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 4590235d30b0e8a524e44dd54422944b SHA-1: 24a882f6023d98a526ce0716b18dad9dcf5b9290 SHA-256: 175e6517d0c13e5a5bedda97ac4965363fa92148212147662d5d8763645f6815
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.cc/123?keyword=hidden+hybrid+holsters+vs+crossbreed In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369651/normal_5f8929601637e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371247/normal_5f899f8ba1cf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5f8dd68c85d2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f95b41acbbc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f98e8e28043a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5f904b4ad51b0.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/8a26b82e-c92f-406d-8a82-69e44cb25cde/35323639676.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/beautiful_names_and_attributes_of_allah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499b2287-2d3f-4dab-aaed-56a4ddae181b/blue_dwarf_star_define.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/99234461407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcd7a69-3420-428d-b544-bbbd6a4e167c/10924274388.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c66b49ac-a666-4d74-a7ed-54419e2ec6f8/dark_marks_between_thighs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedc1216-a0c0-429e-8462-3b8dc56674fb/pmp_edition_5_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3153f96a-3017-49cd-a8e4-01a158a2ad06/52934506927.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76525165-593c-4bca-a4e9-7bcb5814de1e/kozobirilizonebofonakukat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/175b3619-c8f8-4e3f-9a19-b2b1323e1b20/3953704984.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/ethiopian_haematology.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/36628380932.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_off00007dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 5080 bytes
SHA-256: bc0189c2914ef0b366cb9c2d38da083e958a94aa52a7ef2e2fa1c188d37950b4
font_01_sfnt_off00008f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F43 11452 bytes
SHA-256: f982168c50ae65ea2054eab95905fea90d2f05bc3086351cd059d94de0b1e6ab

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