Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ed9ee1a04c0c7e…

MALICIOUS

PDF

67.5 KB Created: 2020-12-23 09:49:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ffd505b93c776769f672c5ddbf7a87b9 SHA-1: b4eb11abef1724869abece7cd4dff20eb89d6979 SHA-256: 65ed9ee1a04c0c7ee8f5b672cf34209bc69c2d79b7d047e1faf82bacb815496a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains a large number of external links, many pointing to disposable hosting services like Weebly, suggesting a link farm or SEO spam operation. One of the primary URLs is 'https://traffset.ru/strik?utm_term=chocolate+mousse+pie+recipe+easy', which is likely a redirector or landing page for malicious content. The document body is heavily obfuscated and unreadable, but the presence of numerous external links and the heuristic firings strongly indicate a phishing or malicious redirection attempt.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=chocolate+mousse+pie+recipe+easy PDF link annotation
    • https://bemijojedir.weebly.com/uploads/1/3/4/4/134479802/b2c7d0.pdfIn PDF document text
    • https://refaxoke.weebly.com/uploads/1/3/4/6/134602084/2884303.pdfIn PDF document text
    • https://fuwamelewupo.weebly.com/uploads/1/3/4/1/134131589/a611161d1.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/6143182.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489414/normal_5fcbc72a80178.pdfIn PDF document text
    • https://wuvibimujefo.weebly.com/uploads/1/3/4/7/134705329/lojajiwesazo_welojovurod_bufutapugizi_mated.pdfIn PDF document text
    • https://bovopoboj.weebly.com/uploads/1/3/0/7/130776351/2529417.pdfIn PDF document text
    • https://munujagafunudo.weebly.com/uploads/1/3/0/8/130873736/4193389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454430/normal_5fb91b1ce3e5f.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/novifamigot/kahit_ayaw_mo_na_lyrics_az.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bedc401c-304c-46db-ae3f-95d680cab004/kitibeses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69d4a803-98c0-4005-ab02-4efa87bec09f/rozebejufubusupivumevi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5afd60e4-c0a2-457a-8e83-aa4f391dbe53/30519512039.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1fc604a-7244-479f-837c-8b774c97c8b3/69519301691.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/sirowekum.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_off0000cbe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE8 5180 bytes
SHA-256: c64ccc6d446370f6102940a732c7c70a0456deb72e78b926a452293f93814124
font_01_sfnt_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 10460 bytes
SHA-256: 0a9f0cda377ec1ea7682c1e2ea4e8bb8fc837010561e0495416ca56c7b2e0c4f

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