Malicious PDF — malware analysis report

Static analysis result for SHA-256 9497ce484c7f9ba0…

MALICIOUS

PDF

73.7 KB Created: 2021-09-23 18:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: d98513da44e2be584706e0a74edd1fd7 SHA-1: e953f16e4ef0e3052b842f89e60e2edb8dbfeaed SHA-256: 9497ce484c7f9ba0a17c073209c826c2dfcb207d5728d5dd60b851b7a705a3f7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised websites, specifically targeting WordPress upload storage, suggesting an attempt to host malicious content or redirect users. The presence of numerous unknown URLs indicates a broad phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613b552db06d4---24437413300.pdf In PDF document text
    • http://bargiel.com.pl/ckfinder/userfiles/files/204369082.pdfIn PDF document text
    • http://bdsductri.com/upload/files/wamabifogubax.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/20672971061.pdfIn PDF document text
    • http://savoie-outils-coupants.com/ckfinder/userfiles/files/27609345022.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/2fbu2hstsodu7cb6t4kmd49f7o/guvedatumidejowofotosodap.pdfIn PDF document text
    • https://edinburghpools.com/contents/files/muwovodisal.pdfIn PDF document text
    • https://techlan.pl/files/file/tubixomedofevidegadalowe.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/35763313734.pdfIn PDF document text
    • https://coevent.ru/upload/files/nanenukigapitageme.pdfIn PDF document text
    • http://rungrawin-itt.com/userfiles/files/gezuxiroxozuf.pdfIn PDF document text
    • https://www.jakketoes.be/ckfinder/userfiles/files/75028640026.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/4275841963.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/84058046867.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/warolidilorigufojalow.pdfIn PDF document text
    • https://fivetc.net/uploads/files/dewux.pdfIn PDF document text
    • http://0985028898.kad.tw/kads/ckfinder/userfiles/files/lososofikiw.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/rilaw.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/65214536777.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/sonilubuvixeguwagolaj.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/riror.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8a7923341---wuriwuzalujubupojoge.pdfIn PDF document text
    • https://ahreco.com/uploads/news_file/31600602986.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/29f5308f67c2ded8d1ec7adfc7ec624f/81290134208.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210911_003326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=stephen+hawking+notable+achievementsPDF 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_off0000bbae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBAE 16712 bytes
SHA-256: 2cbe4553f2097f76471b5f68101fed986df46b779d4b6cc31e81b16f306f9464
font_01_sfnt_off0000e6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B1 11180 bytes
SHA-256: 5d04b189ea0fb5bb8cbc0d47ce64e9de88a5b75d595b01b442bd2e5281793df2
font_02_sfnt_off00010080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10080 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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