Malicious PDF — malware analysis report

Static analysis result for SHA-256 e66bb3d88e20fe69…

MALICIOUS

PDF

75.8 KB Created: 2021-04-06 06:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 137082224d75bee52aad386713585fe2 SHA-1: eb82f25e8dfa72b55cd515dc82153e5f41b7623d SHA-256: e66bb3d88e20fe69348b92a28fe77e1f12be499b36034a033ebbba05bda723c7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a site that appears to be a link farm or a lure page. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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.
  • 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://xezojetit.ru/wix?keyword=deep+ocean+biome+plants PDF link annotation
    • http://ses-sanobrabotka.ru/nusijorapugamedeler4xt63.pdfIn PDF document text
    • http://sirikaf.22web.org/bible_malayalam_download.pdfIn PDF document text
    • http://vuvuga.xyz/how_to_recover_facebook_account_without_emailyplle.pdfIn PDF document text
    • https://bewebisiseten.weebly.com/uploads/1/3/0/8/130874130/1803159.pdfIn PDF document text
    • http://subfamjtii.site/template_for_booklet_designjmfl6.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/japawomapipoxizo.pdfIn PDF document text
    • https://lavabowigu.weebly.com/uploads/1/3/2/6/132682694/6599302.pdfIn PDF document text
    • http://kneeksi.ru/47383554016ozehs.pdfIn PDF document text
    • http://blu-ital.space/44477425868xu5z6.pdfIn PDF document text
    • https://govasosu.weebly.com/uploads/1/3/4/5/134519533/2447597.pdfIn PDF document text
    • https://samovibemajus.weebly.com/uploads/1/3/4/5/134597991/51ee3b8.pdfIn PDF document text
    • http://zarabatyivat.ru/82314447311rsjkw.pdfIn PDF document text
    • http://douchehq.xyz/supetezetevawilofoigfh7.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/xesigeze/losuto.pdfIn PDF document text
    • http://wunikuwikefa.epizy.com/bubam.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/wekabokimatomijujexoro.pdfIn PDF document text
    • http://kujazidi.epizy.com/statistics_hypothesis_testing_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/17121549488.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/95881926341.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/how_to_write_a_letter_to_a_military_person.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/confederacy_of_dunces_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/68909113192.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/bloons_tower_defence_6_ios.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_off0000ed1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 5120 bytes
SHA-256: c59e37fd8b93c8bc9e0ba94652a5aa44bd7f1c496af7a27cdf43aa6b2109ca81
font_01_sfnt_off0000fe78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE78 10272 bytes
SHA-256: 00a8544adc53224c5cd26d0c1d3d3edd7e6e86cd382daa87e67a833ca44a555c

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