Malicious PDF — malware analysis report

Static analysis result for SHA-256 1430b66fbd0a78d7…

MALICIOUS

PDF

90.3 KB Created: 2021-09-07 05:29:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 657f205b4d2055e330d1e383f568073b SHA-1: c0f1b3874ad5d9080b8803ea8a30c4fc07e43343 SHA-256: 1430b66fbd0a78d7e7eae253aafebcb8efd57f6f23068b4257bbcbd2619bae7c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The file's structure and embedded URLs align with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://itchanoi.vn/uploads/news_file/9613082312.pdf In PDF document text
    • https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/45058522294.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79c5f8abd5---45681514748.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/35431b644c8586000a36ae142f978fc9/79492309040.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202107032231.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c791823c39a---jelikogul.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/d7ffbd5992247735af179a25c15f5db5/94862097786.pdfIn PDF document text
    • http://ballstonfamilymedicine.com/clients/861402/File/84414859605.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/d9cbbdcd6b08ac666d1a7d687036b365/miriwipavifuwa.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/xekilosiduraxixo.pdfIn PDF document text
    • http://ccsilver.kr/files/fckeditor/file/181128345160ff9750cbbda.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/nlqlg2k40tbbhela9faqk4kt97/83747358841.pdfIn PDF document text
    • http://sport-way.ru/img/file/90252568468.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160df81399b059---52901191046.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/wujuxaxurofuzowux.pdfIn PDF document text
    • http://valleypainclinic.org/userfiles/file/nasawivil.pdfIn PDF document text
    • http://redactron.com/userfiles/file/lolijusufakudigu.pdfIn PDF document text
    • https://damsindia.org/admin/uploads/file/70886660779.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/kipotodebimaxobim.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72126253c5---vipabovixolikekojejiwu.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/zikuwatuxitijusojodukot.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/folusawukoz.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-8-21/20210821155656160897.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/lilumugezafiwuvug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=th%C3%A9orie+de+l%27interactionnisme+symbolique+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_off0000f045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF045 11536 bytes
SHA-256: 5c2e23b49516474e3fe62ecf83b461b6a8e986653365edeab0812d66ddc4be34
font_01_sfnt_off00010ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D2 21760 bytes
SHA-256: 89f0d49d252933e3ec9aabc7d0de3fb4b7cee950d523268296656dabb359c04f

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