Malicious PDF — malware analysis report

Static analysis result for SHA-256 40eaa77bab7354f6…

MALICIOUS

PDF

35.4 KB Created: 2020-10-19 04:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2be430af8c17e8b7ceea9d7fc69d42cf SHA-1: f82c1a16a088bcb45fa979d34f835a6723f1da05 SHA-256: 40eaa77bab7354f625a853b50353052a2f9ee74330f3e991a53e2e8ba47c5237
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://cctraff.ru/strik?keyword=the+hive+minecraft+pe+server+port In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f899a8dab66a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385410/normal_5f8cc6e2957a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384039/normal_5f8cc165c0488.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370068/normal_5f8cc13db0983.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368951/normal_5f8b65e6c4c50.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/fotozu.pdfIn PDF document text
    • https://pepotoxuxomupav.weebly.com/uploads/1/3/1/4/131483830/24e248e6e441.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/xodam_retitowotekudim_nopef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f8c05b3653f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f88b404903a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f874994ad968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_5f874b0c39ba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f87205046f26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f8ca2fc9c0a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5f8ce8358c6f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_5f8be71c820a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_5f8b6e016da8f.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/1/0481/3707/6889/files/west_stokes_high_school_football.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6277/8263/files/45629314386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6172/2788/files/61c_act_answers.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_off00004d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D04 5232 bytes
SHA-256: dc1054e05aca879f4b50901b1e7bc34a47ef47d5eb78bdd01017a57475bc679a
font_01_sfnt_off00005ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA7 9692 bytes
SHA-256: ce6321c46486374d7940a21eee3af8f4146f7e509af1bec00b70aa62b8199ba2