Malicious PDF — malware analysis report

Static analysis result for SHA-256 3feb3d92cf0faa27…

MALICIOUS

PDF

37.7 KB Created: 2020-10-26 00:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 718bd18ca99d605f36cf47fd1803a85d SHA-1: 614a3cc24fb27ba293e2b769893ce10584647209 SHA-256: 3feb3d92cf0faa276fd1486d7b7c212f6dd4d45aaeb11cf9396d19664fd81b72
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/aws?keyword=the+blind+side+book+pdf+free In PDF document text
    • https://buxiniti.weebly.com/uploads/1/3/4/3/134309366/jogejutitato.pdfIn PDF document text
    • https://gagumosesixibo.weebly.com/uploads/1/3/4/0/134018544/0ebde8a950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5f95b9447258c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f873152f2d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382972/normal_5f948e00f2aa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5f8cf19e7354d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5f89ed4658563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_5f872e16dd183.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/51d3c04b-ec14-401f-8af7-4dc87a33889e/mozizozamofabudokawaved.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce39857c-58ec-4fef-a6f4-a55afa9524e8/xovewotuvigupomikunaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f47af5d9-76b2-41d1-8813-18ab4a002c95/xenitiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/xewuniwagitusimuxoxitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6563/3699/files/60948844599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9743/8405/files/dipizimebigetelab.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/gutunoku.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/adding_and_subtracting_rational_expressions_with_unlike_denominators_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/48849553187.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_off0000540e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540E 5072 bytes
SHA-256: a0078c730771084aa609c5d391351462876185119c0a3d0f1a28e6163f7579b5
font_01_sfnt_off0000653b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653B 10688 bytes
SHA-256: 05cb8dceeeae96af911fc80cff8dca609392f24d75ca45fa4fdef3d693a1e04f