Malicious PDF — malware analysis report

Static analysis result for SHA-256 72fbdcc34a99e276…

MALICIOUS

PDF

68.9 KB Created: 2020-12-27 03:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: e1da9856047704ecaa7e1bb6701135ac SHA-1: 66ac646e0a8420d3450e5c91e5d629ecf9308619 SHA-256: 72fbdcc34a99e2769223a2817df8c23835167bd97924fab8b91b3c9ff7184d0c
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://cctraff.ru/wb?keyword=mr.%20rebates%20cash%20back%20savings%20bank In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471995/normal_5fcb0cacabc95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5fa10add55565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446773/normal_5fde57918c08f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_5fdc598a75522.pdfIn PDF document text
    • https://cdn.sqhk.co/linerutinew/igG1Mgc/45495899264.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_5fe7d8a00dcf9.pdfIn PDF document text
    • https://jadekida.weebly.com/uploads/1/3/4/3/134349878/a16e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426676/normal_5fde11516eaba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369498/normal_5f94dfd449445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5faad0acb090c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_5fc1f83101694.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/gfjdjgf/litizizozeze.pdfIn PDF document text
    • https://xaxaguxoludu.weebly.com/uploads/1/3/4/5/134519627/lelixoxin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420029/normal_5f9dbec977bf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wovisak/37908399037.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_off0000d026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD026 5332 bytes
SHA-256: 443d52a0dc91f0f4852bd6ef2501456b13fc23bf81f16b08037029f49506130b
font_01_sfnt_off0000e25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25B 10660 bytes
SHA-256: 2855eb57b7ce4b0f6425e2061181e2a46b8075df14c777896c32d94107dc7ecd

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