Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ab20e5ee32ec23e…

MALICIOUS

PDF

91.8 KB Created: 2021-02-14 15:07:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 420702ea0cb5436c0d1bd1d5bf308d4d SHA-1: e9b934164f8a4e1fddb5c0fb66ddd43924e836f5 SHA-256: 2ab20e5ee32ec23e93e7b36d74be2f7b2bc381d8e180d8a5fa6ca1405fe25911
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

Heuristics 5

  • 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 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://leonvi.ru/123?utm_term=do+we+need+a+new+earth+ethics PDF link annotation
    • http://trells.space/41694289092pvil4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fe0d1a2b7177.pdfIn PDF document text
    • http://epaytds.xyz/ravished_by_the_triceratopssvzm2.pdfIn PDF document text
    • https://jifonoru.weebly.com/uploads/1/3/5/3/135316211/gisatitawun.pdfIn PDF document text
    • http://nizagose.66ghz.com/krishna_cartoon_images_hd.pdfIn PDF document text
    • https://votozugilom.weebly.com/uploads/1/3/1/0/131071295/7662049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368772/normal_5fff5cd689563.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5fcb4178e4482.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/667698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408460/normal_5fd0af77ee437.pdfIn PDF document text
    • https://kunimagim.weebly.com/uploads/1/3/4/6/134608209/6462224.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://barajirotufaz.rf.gd/30425949979.pdfIn PDF document text
    • http://sunuwib.epizy.com/83990234822.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/acrylic_mirror_sheet_singapore.pdfIn PDF document text
    • http://vukigopi.rf.gd/literature_trivia_quiz_questions_and_answers.pdfIn PDF document text
    • http://rigirulame.epizy.com/bipovutokifudodajubemuwed.pdfIn PDF document text
    • http://netupizorazez.rf.gd/17224599551.pdfIn PDF document text
    • http://mafujegimeti.rf.gd/nakudadil.pdfIn PDF document text
    • http://gizimup.epizy.com/95152734344.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_off00012d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D47 5084 bytes
SHA-256: 2f9132061260047ce41d8a4dd31793d3200d03e0bee927d00e5ae825c19effb2
font_01_sfnt_off00013ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA7 10384 bytes
SHA-256: 6395d808366cc8f9402787c777b0c2846f5aacfe1730ab172284db2d8d4de4ee