Malicious PDF — malware analysis report

Static analysis result for SHA-256 6492a0b4bbaa1915…

MALICIOUS

PDF

73.5 KB Created: 2020-11-10 10:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 3c87c7748db731257ca244e5c99caedd SHA-1: 9f88bf725b9cc16e8e37e07814979e7d0010d23d SHA-256: 6492a0b4bbaa1915d16f9de403f56678d962e19d9dacb06b087f1802357e4369
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://traffking.ru/aws?keyword=download+morpheus+tv+no+ads+apk In PDF document text
    • https://xinotojopafexiz.weebly.com/uploads/1/3/4/3/134316842/temefose-vexunufedura.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411001/normal_5fa84e9773408.pdfIn PDF document text
    • https://zuxuzesis.weebly.com/uploads/1/3/1/4/131438019/5683627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_5fa054e26d376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369646/normal_5f8862119d09a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5f9f243ed0610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5fa45cad1e3f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5fa8c2b145f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_5f8c24e377136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385863/normal_5f93878185d60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460460/normal_5fa4d15f40c1b.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/wegemebufojafak/how_many_weeks_are_in_a_school_year_in_illinois.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/80011444276.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3fa2c6a-1583-42ae-9b83-4eb1c9c442de/tekipuzovikubupikofevupe.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_off0000e1bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BD 5412 bytes
SHA-256: 827254a978d8f079dcb6985913a185e712922281503db26df5498746486dbf82
font_01_sfnt_off0000f414.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF414 10780 bytes
SHA-256: 4205bd3b0f73992479590b3a77ade765a21c2551a4a4bdc97f0467f04cb77bbd

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