Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3c7febc3013cca…

MALICIOUS

PDF

71.0 KB Created: 2021-04-22 07:02:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cd9f6a358db03d9d510a4c0ffdbe7ca8 SHA-1: de2419495c76944445cedb866eb03adcc85344df SHA-256: dd3c7febc3013ccabc1f7bf4faae2d77e57ecfd8601f1ba005eeabaf34788d7b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=acorn+stairlift+superglide+120+user+manual PDF link annotation
    • http://burrrhey.tech/58346447377x68ol.pdfIn PDF document text
    • https://cdn.sqhk.co/nebafori/iajbeJ7/island_in_the_sun_belafonte_lyrics.pdfIn PDF document text
    • https://suvojenedixu.weebly.com/uploads/1/3/4/3/134354738/1a853e2a.pdfIn PDF document text
    • http://espaceabonne.com/nalopedagobaraditbxcin.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fcca85725a74.pdfIn PDF document text
    • https://cdn.sqhk.co/xigofidiw/MieVhjx/cars_vs_cops_4j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467601/normal_5fedcf1a9bcbc.pdfIn PDF document text
    • https://bavobero.weebly.com/uploads/1/3/4/5/134585538/5531332.pdfIn PDF document text
    • http://leafester.online/wudivesabetujinaxokima2yh.pdfIn PDF document text
    • http://msertis.xyz/how_many_calories_in_a_nacho_bell_grander22ag.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/14e7944ce.pdfIn PDF document text
    • http://lishop.site/cb_background_images_hdh4wcf.pdfIn PDF document text
    • https://zujituxo.weebly.com/uploads/1/3/2/6/132681889/3162776.pdfIn PDF document text
    • https://cdn.sqhk.co/sunawopi/hjcgcge/gijita.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/330df65b-6b2d-4a2f-bb80-500c4352eaa4/28769749676.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9c9f64-de8f-42fd-ad4b-39e8518aa7cd/how_to_operate_a_telescopic_forklift.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1a19ef9-781e-4b80-8034-1c0f0e96302e/takekozasojusulaberug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35179d42-a10b-44ee-b555-12e6a9b0034d/8567027606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a651c6c8-4bd3-4566-92e1-91d819a9701f/tubizolibaguretesos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f08dcc-e2d8-4147-a072-79faae4c51ce/pagas.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_off0000d7a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 5788 bytes
SHA-256: 3f9f2c56d68977dfed2bd1f4b7b3559790a31e80cde69cff3f92d774d0e28ff0
font_01_sfnt_off0000eb4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB4B 9908 bytes
SHA-256: 1ebbd2f4aeb8e220046ea53b5557efbe92b4cb4bca0bb12a92ad53b0020a8b0c

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