Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f287ca2d6bd2798…

MALICIOUS

PDF

184.9 KB Created: 2021-06-12 03:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 558e226b55ca5a2381cd433ba3e719d8 SHA-1: 7023d67542c35bfbf112e51a7c3c6814514d28ae SHA-256: 4f287ca2d6bd2798e7269c55c6fff3dbe9e8b914bd1ee45138377880ef34c5a5
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains a large number of external URIs and link farms pointing to potentially compromised websites, suggesting it's used for phishing or to redirect users to malicious content. The presence of 'Carrion demo download' in the document body, though garbled, combined with the external links, points towards a lure for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://allytemp.ru/uplcv?utm_term=carrion+demo+download PDF link annotation
    • http://creativeindustries.ru/uploads/userfiles/file/2998876436.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/c56258a1827f595d1cb79f251b6e5be8/lawunigabofupagunino.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944c6a6d9fa---12667266716.pdfIn PDF document text
    • http://goodslib.com/userfiles/files/75799850092.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091eab2b1eb8---92570865647.pdfIn PDF document text
    • https://ikitellirezistans.com/upload/files/70840160265.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/29972290285.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16099b02dc252f---zoxezas.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/35294813361.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e214625c7---92128242786.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff795daa2b---sujujub.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608041691e38f---tozulugajuzaxirezutopur.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/c921b7a946a5c0c4a0411286f0852699/50047621312.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/f5a286d88b642721791af14f0bee701a/20025271391.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/n0qr3s6qfrcskeqtq5st70psnq/14517924621.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/diderefevebologij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00028a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28A7D 5316 bytes
SHA-256: fbf755069ee6fc6d82cd02dc264f79747980461aceef2511760ae7ef73e36e2a
font_01_sfnt_off00029ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29CE8 4788 bytes
SHA-256: 3ec9a033b2e688be866ec63674f1d2b8ab34366e2b1a264ff22ee28c3cdbb36e
font_02_sfnt_off0002ad26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD26 11976 bytes
SHA-256: 9de3035958ce0d4eb116821677b8b03b9c81cb7174b8a2e125773c5e4f96c72b

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