Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4fa7d0c52d1393…

MALICIOUS

PDF

43.8 KB Created: 2020-11-01 04:23:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4e658e7136904f4a5f3d5422cb8f1da9 SHA-1: 42d896dddcdc62b34d27d1ca5672ddd1d8cc92e1 SHA-256: 3d4fa7d0c52d1393a8624f3d866c0b42c4f729dacd42f85b8cd621eb15407b02
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://ggtraff.ru/123?keyword=summary+of+graduation+by+maya+angelou In PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/2047031.pdfIn PDF document text
    • https://tokafiwunan.weebly.com/uploads/1/3/4/3/134372509/balotejilutazi-mavadeduliwekid-forodarape-sirane.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_5f910562391d6.pdfIn PDF document text
    • https://gudemulu.weebly.com/uploads/1/3/4/3/134387893/sizupodipiwunuxul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5f91ded3466ba.pdfIn PDF document text
    • https://jaregufadux.weebly.com/uploads/1/3/4/0/134016720/8657662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f92ec54f2a9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3368/7750/files/ximudoxawabaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0937fa21-fabf-4d8c-bcd9-2dc1854309c0/punctuation_worksheets_grade_4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/8794/5622/files/l-shaped_desk_assembly_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/dell_inspiron_one_2305_motherboard.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_off00006c56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C56 5392 bytes
SHA-256: 37b366bd336de83267943c2ec33abaeb47b681592bb86b2dd2c175695ff08780
font_01_sfnt_off00007e9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9C 10080 bytes
SHA-256: fa6c63de3ef5e1f87956b05f283b93df906ab6a47da35f3e12c19b7c20450375