Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2bc9408df1ba2a…

MALICIOUS

PDF

86.7 KB Created: 2021-09-04 08:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9bdd4938ce5712d5b7f67c78b4a0617d SHA-1: 4ea9ef49caba0a983f564aa64d973ebf83559dd5 SHA-256: be2bc9408df1ba2a16c88d457b7e9d57db4c3e68e634e9428561b1b439217621
96 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs and link farms pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier strongly indicated maliciousness, and the heuristic firings suggest this PDF is designed to redirect users to potentially malicious content or for SEO manipulation. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • 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://pi-consulting.ch/download/bifemuket.pdf In PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vfi4deoci6u0kntg3ha5u1aef0/vixowid.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/a395b06ac505ca688929393d173cc372/xugutifakijora.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fbe67eff7---vujidu.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/nivomebop.pdfIn PDF document text
    • https://alutat.com/data/file/raridezu.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///40800994617.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/21767812607.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/06d2ce5ad23245befa510a2a4a0e1414/17994191089.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1f80519f---reneguragaxizop.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/nuwazataginavamoloxa.pdfIn PDF document text
    • http://auto-spec.ca/fck/file/tukunazeselawu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/bac97ef8e5d8a516a2d2ab16fd42643b/soxiwat.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/45109919159.pdfIn PDF document text
    • http://master-sign.ru/ckfinder/userfiles/files/48219688000.pdfIn PDF document text
    • https://travelinnsuites.com/nbloom/fckuploads/file/javuxave.pdfIn PDF document text
    • https://finliz.lt/i/File/46211541162.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/53297073724.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bd467ec2783---91866057555.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/95a40e7abb8c6aa78de540e94641eb98/26727612829.pdfIn PDF document text
    • http://fcraregistration.com/UploadedData/file/xiwokofowiz.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/fomavavixix.pdfIn PDF document text
    • http://summithigh75.com/clients/867147/File/78756405407.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/54120083308.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04d38a4c2e---pidojuvuwaxulabimitofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=sudoku+tips+and+tricks+advanced+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_off0000ec08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC08 18432 bytes
SHA-256: 5b4aee4cc2cb14ca7c01a5097f3e7bfa54b2b26740bf2415e765bcbe2fe2940e
font_01_sfnt_off00011b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13369 10900 bytes
SHA-256: 2a394520e418b2128b04218f885ba3bf65f3feb6fa6db6a2e5c3399bf20c7068

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