Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9eaa4eab63348a…

MALICIOUS

PDF

67.7 KB Created: 2020-11-11 01:58:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b2ae026bfd97c02a73787cb059fda480 SHA-1: 59f2b4ae34726328ca6e85eb3f75c6d730765bc9 SHA-256: ec9eaa4eab63348a2ddc0b2a325f1af7dd9e3c5b4c288f127c8cebcd5d14e383
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffking.ru/aws?keyword=cast+umbrella+academy+number+5 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f935e180fd8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370052/normal_5f8996afcd967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5fa92cd98d249.pdfIn PDF document text
    • https://nixejinalir.weebly.com/uploads/1/3/4/3/134321479/9890293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_5f9c52fbe1231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449187/normal_5f9f57debc3ac.pdfIn PDF document text
    • https://porutopor.weebly.com/uploads/1/3/4/5/134515231/6724718.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5f93b40d89d26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f95fb8c6e3d8.pdfIn PDF document text
    • https://kukotefuses.weebly.com/uploads/1/3/1/6/131637352/8c6df.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/0c85825f-a2d9-49b3-95ff-ac6b4fcf30d3/gobekur.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/fumikuzeginoxu.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_off0000cac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC7 5356 bytes
SHA-256: e2ab401f65d0445a6821d9343e5b12b02d08eeed78039e3e54013d6ef0961144
font_01_sfnt_off0000dcea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCEA 11160 bytes
SHA-256: 5e3d67c8aabf563ec578c64e69623f6d000ea9cd375d6cdeab30a90cdcbbf615