Malicious PDF — malware analysis report

Static analysis result for SHA-256 6069a76d85f647e9…

MALICIOUS

PDF

81.6 KB Created: 2021-09-07 15:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5552cf9088139b6942ff76b56952afdd SHA-1: 1ed43bc7fd120ea46633f5b04ee3ebd5113c06b2 SHA-256: 6069a76d85f647e993338627fae6101c685dbc07beaeaf255c7c252ecf122705
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites. These sites host further PDF files, suggesting a multi-stage download or redirection chain designed to obscure the ultimate malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1b1c34d14---zewuzovikirovikugete.pdf In PDF document text
    • http://evrofurnitura.by/elax-furnitura.ru/uploads/files/todiwaba.pdfIn PDF document text
    • http://lakehighlandsrw.org/clients/863582/File/wobotubozafa.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/84026906881.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/fazefagisorojuzewi.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072694f3b0b8---xopusamegojanibu.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/een6a1fja1rvdos0ikh1eh69m8/77014640162.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/536ca8d2eae4f98e23b577f2102e900f/bululatumiban.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093aaa400154---11136969505.pdfIn PDF document text
    • http://humboldthighclassof79.com/clients/1/19/19f040aad945c40a0acbd79abd3dc6cb/File/jigopefasomejogef.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/4899f9a504e6dbbd04a4df2871430bb6/72183483565.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb376d682f---29267624557.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/debifekife.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/rezutafig.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab89cf25269---19597743644.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/95124847418.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/90217859c7efad33e20bc381c80f1d1f/tezoxagib.pdfIn PDF document text
    • http://s-privod.ru/userfiles/file/39764233939.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bd67d83af8---69958042612.pdfIn PDF document text
    • http://spec-so.ru/sites/default/files/file/14442634362.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/bitisutujufexosuk.pdfIn PDF document text
    • http://caramelitos.sk/files/73797241545.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ischemic+heart+disease+adalah+pdfPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF36 10612 bytes
SHA-256: c03dad7bff01253c7bfe567e749c7e4615f8eb06248b59d4dfe9d25bd0dcf7dc
font_01_sfnt_off0000f76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF76F 16200 bytes
SHA-256: e000cffec44a24934cee5b8a4772cd9b63d97200e3a0b819538c138800870ad7
font_02_sfnt_off00012109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.