Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e0021ff7bace759…

MALICIOUS

PDF

89.3 KB Created: 2021-10-07 22:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff9b972d0291c7482fd7cc99ccd19f92 SHA-1: 7f74cbc214f1a1f6bd4ccf5cc08990fb21fde56e SHA-256: 9e0021ff7bace75954c40f7be45a6b849c01453e9d758885d9ae2fdf607914eb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

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.diplomat2014.ru/ckfinder/userfiles/files/95147940761.pdf In PDF document text
    • http://fiumevivo.it/userfiles/files/57022967633.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1614c19245570b---55057097324.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/45280783324.pdfIn PDF document text
    • http://www.sana-anong.com/ckeditor/ckfinder/userfiles2/files/38365634949.pdfIn PDF document text
    • https://dsverano.com/UserFiles/File/24122538522.pdfIn PDF document text
    • https://alstar.uz/images/shared/file/37597235848.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/48241515634.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/relejufozoxorijikorip.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/zegajavuses.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/buzuda.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/h8berdrhk8rq3fjv2rjb3dl34k/zifidirep.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/60676532637.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/9ca458f7dd357ed09d71b2c4d611435e/62105619418.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/lejapuwileweko.pdfIn PDF document text
    • https://espritgt.com/userfiles/file/limuxorerawepe.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614db47cab5e7---polovunokijoku.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/25529357257.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/jizoboretifasi.pdfIn PDF document text
    • https://www.andreivieru.com/ckfinder/userfiles/files/1841109042.pdfIn PDF document text
    • https://trainova.com/userfiles/file/gusoruzumibareg.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/19579548175.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139532a4fe38---93696711681.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/rowinipikeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+level+does+zigzagoon+evolvePDF 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_off0000ee60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE60 10548 bytes
SHA-256: 18bacab74506f45d23c07315bc5466f9ee104d3bb736bfad759f3350b9b626a9
font_01_sfnt_off00010639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10639 21664 bytes
SHA-256: ac73d34c36656abbb3002985cc26e673a15e4c5080f70496d9fe52805ee0ea75
font_02_sfnt_off00013f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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