Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6fc3b3e28b8414…

MALICIOUS

PDF

44.5 KB Created: 2020-10-15 20:09:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ca65c0a7806780107b692b9409508f23 SHA-1: 5a0ab7a9b8d065a12bca1ffb71068642aa546c7c SHA-256: 3b6fc3b3e28b841436d88bc9fb8bbadc7cb85da8566ab41050578bf05854c7b6
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://gettraff.ru/123?keyword=call+of+duty+mod+apk+2020 In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/3731638.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/8f24ebaa3f201f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5f8804473937e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f879e3a64fd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5f870fd4a8291.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_5f881e1f864b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366661/normal_5f8724f019543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f8838d862e85.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/20021240439.pdfIn PDF document text
    • https://site-1048186.mozfiles.com/files/1048186/livre_para_voar_fabio_teruel_download.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/1/0432/3239/5423/files/ninesusibuvovuruf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2962/files/56395422975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/lidoti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1757/6354/files/sword_fighting_styles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2588/9442/files/kanojitoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88887c35-7f35-4b93-ae07-55b5cc48f095/guvigiwabufejaberizibexej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d001e82-c5f6-41f9-bf0e-4589525a1d3c/91707146380.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_off00006fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC4 5256 bytes
SHA-256: 22bbb56c41c85de9dd19c4844cda4a82778a3104589a4c776db53642d881f611
font_01_sfnt_off000081ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81AB 10332 bytes
SHA-256: 20c0f0552b3b9df722007f586e229168f2adaaccee678b5643e2ab23a3af1e52