Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fc0df79e94a052e…

MALICIOUS

PDF

70.2 KB Created: 2020-11-10 09:51:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 8f6afed1b36e169582d70a6a2288f21e SHA-1: 531aab30a7e3aeda53e4ac148885e08ffe751f32 SHA-256: 8fc0df79e94a052e9ad3fb559400a679f1dbbe704c845ecf409cf1dffe82677e
244 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.
  • 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://traffking.ru/123?keyword=the+outsiders+answer+key+comprehension In PDF document text
    • https://wozukofa.weebly.com/uploads/1/3/2/3/132303282/b37e69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378846/normal_5f8be43932687.pdfIn PDF document text
    • https://mesedegusi.weebly.com/uploads/1/3/4/6/134600151/7287017.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/5d6f2da.pdfIn PDF document text
    • https://fujidefabez.weebly.com/uploads/1/3/4/5/134512048/vikir-fuxesuf-jojaxuvupom.pdfIn PDF document text
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/953dd107.pdfIn PDF document text
    • https://gevafitasib.weebly.com/uploads/1/3/1/3/131380901/c25f730.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/nafibanefexex/pufovekujorugaxajimerevat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96bedade-59f6-4b15-96b1-f9f9a9567121/10352525542.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/cambridge_english_advanced_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d47847-1302-4666-994c-d3faea377596/83091660046.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1b71f4f-1791-47b3-8de0-dc2d7529240b/31237813552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfb0e3f4-155d-4d46-8ba8-1e42343f0d29/1_4_7_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0741a41b-d37a-4d42-bbe3-6897ee30fe43/46822885755.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD691 5488 bytes
SHA-256: 54c07f34f241bdcdc14957c47174c57e605a6ee13a14bb1cdb0bcdb49d129444
font_01_sfnt_off0000e92a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92A 10128 bytes
SHA-256: 4cae4151465237c87cb79a24c375ce8f2b61606f380e50cd23ca1f8426334b51

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