Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09fde4813440cd1…

MALICIOUS

PDF

363.5 KB Created: 2021-06-26 05:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 9a5e9800caa806fb408a38b2bf373f2a SHA-1: c55769d49be729bf477af02ece46f471ab5299f9 SHA-256: c09fde4813440cd1ef2fbebcf99eaaf5de4e7c9fa5a2dcdc5f90f8ba3db3c805
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains numerous external URIs and links pointing to compromised CMS uploads, suggesting it's used to redirect users to malicious sites. The primary attack pattern involves exploiting the PDF format to deliver users to potentially harmful content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

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
  • 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.
  • 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://huntic.ru/uplcv?utm_term=traditional+chinese+headwear+male PDF link annotation
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e35688e9d8---38297691273.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/kowomijoxalivawopas.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/7682243418.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f60b6929e5f21a131761aad4fb62b7b8/86711916106.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/m2bg27u99o6tgsouv45ajmvqv2/59574519148.pdfIn PDF document text
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ec729ed4e---41774082762.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/boned.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/8af4194bb7a0a10d0d0c03c13e2202d6/jonuxedowivuwirevijut.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4f82a0d71---46383284492.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/33016035280.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ced86211d0b---xobek.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106041445251023.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/u5kpn4go6bbht0m06aibnbpfn1/50437549706.pdfIn PDF document text
    • http://ckrestaurantgroup.com/ckfinder/userfiles/files/34697362082.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/liqreaontsoo9uqu82hd9h4gpi/9865411550.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/hi46p3dueafsr7tsh4h5db40o3/joxakotisotifosap.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/57234160974.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873f8af2d05---70229524134.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/siboniziwinixiluju.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/525c021553240e0f0c021283bdf5a764/bosoniwelosubaxarejatazib.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/mopegovobuvuxowelit.pdfIn PDF document text
    • http://mmbc.cz/_data/user_files/file/wajataxotaberibor.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff885da099---kujanisajekugevajabafer.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/katalamorulalod.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0003df2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3DF2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0003f740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3F740 22396 bytes
SHA-256: 1664904440d3588150f6ac613d6aa87e476cf67173f7f82218a675fdb7a4dc70
font_02_sfnt_off00042cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42CF3 141084 bytes
SHA-256: f0bcba56d5525a0af8e52781eff9a54d8da88c47ddb02d94dd8358da492c3e3a
font_03_sfnt_off000586d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x586D4 10684 bytes
SHA-256: 44348c99c160286d3a771f9ed16f23413a3ecb4fe7a36b3fd60b82154380af83

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