Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e8ddab94480394f…

MALICIOUS

PDF

66.8 KB Created: 2020-11-22 08:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 8652d09f96230f2c0a68cc96d6b8a87f SHA-1: 71221c2729209ede2dbe89e6c4db4167c4a051c7 SHA-256: 4e8ddab94480394f539a5a1b1027c925b2e920b7abf5b5cb57cdefce134caaac
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/aws?utm_term=edgar+allan+poe+pdf+gratis In PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/bozuneja.pdfIn PDF document text
    • https://wajugipime.weebly.com/uploads/1/3/4/6/134646119/giguxopifanavesikim.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/vekew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5f975970b6c14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457881/normal_5fa9ac056ffcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5fa69bec34ed7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402478/normal_5f9512d1eaf25.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/xizipixiresupega.pdfIn PDF document text
    • https://mepefukuwipo.weebly.com/uploads/1/3/4/5/134523025/d3a77fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383702/normal_5fae41edeeb85.pdfIn PDF document text
    • https://bugusurev.weebly.com/uploads/1/3/4/6/134615575/3970642.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366660/normal_5f8d3e5976838.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/e3f558d0-2d03-4d3c-ab99-74743b2cf97d/vipopizefotaponasanorivar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ad0bfeb-69d0-4764-8333-c618e43d1e54/8796019378.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5800e581-4285-4e8d-bb39-bb6145ff8aa5/73517940826.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_off0000cbc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC3 5168 bytes
SHA-256: a6193ea83b073afda12593fce81bd33b2e08be3e9486e2eac79c8b2e6afbb019
font_01_sfnt_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 9800 bytes
SHA-256: 726eaec5a7e998103cdef4efb0f2933d6864dc85b83a930f09d3560904580b39

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