Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda6e481338bd6c0…

MALICIOUS

PDF

64.0 KB Created: 2020-10-20 10:08:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: eba7173166c4b991687110b04d6f71e4 SHA-1: 1f30afe4fd7748b0ee3c3b089f62d067c3ebf40d SHA-256: bda6e481338bd6c025beb4a6dbc27b9c17f4fccbecbdd5b1754668c6e26eed85
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://ttraff.link/pify?keyword=bhalchandra+nemade+kosala+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_5f87db5b8e8ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366405/normal_5f8d5fc0f3dc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375341/normal_5f8a6b38f06a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368248/normal_5f881cd8dbd3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5f8e73cddca0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_5f89c9ea18168.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378153/normal_5f8a67bf0217f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f870a489a708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366395/normal_5f8e520c49eab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5f8a6d57d4497.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f86ff7c4f4bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1207/4915/files/59596252951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8912/4258/files/honors_geometry_indirect_proof_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8565/0848/files/35701564120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6841/5400/files/social_paradox_in_a_sentence.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/boxojokemopij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6996/7013/files/collective_nouns_worksheet_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/1986/2694/files/82745279331.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8881/9864/files/47364433427.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7409710a-dd7d-4722-94ec-642f007d9873/wefip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ae97192-6496-4b9f-be5c-f59fe672d586/dolekagebezuzelupifulowaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8be786-0242-454a-afb9-66f83a2b1d0b/netagamiru.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FFA 5508 bytes
SHA-256: 2ba69db76540a9439cad57f4b90145e79e4ee9084e1acb15bc8181c543e03485
font_01_sfnt_off0000b27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27F 10240 bytes
SHA-256: c5358a17921dda07fca029ba8a18857ffe0026d567976cbfe9e6e94d4beb2f08
font_02_sfnt_off0000d57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57F 8640 bytes
SHA-256: f566c60d44ed7113345c23df4a094eed78434d84c863db43cd7a6b06c6b7124a

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