Malicious PDF — malware analysis report

Static analysis result for SHA-256 d113577ed7ef8cf4…

MALICIOUS

PDF

80.4 KB Created: 2021-08-09 04:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a6321c8d49652fa1760507ce3d04257 SHA-1: dc6ef2a4969326df817001d029e0bd9fe12d26f8 SHA-256: d113577ed7ef8cf425cdbcf7cf520508420ca63d96d912886a2e07885ff8148f
156 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://buzmakov-ua.ru/admin/ckfinder/userfiles/files/menopozodalufelivikus.pdf In PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa2ad5585---sipotalasiwajaxupon.pdfIn PDF document text
    • http://imaginove.eu/data/Files/zatojijolad.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/07shv8gtf19t08cr1l1cb8bjjs/92808951941.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/618f4d908f3c263d79bd9fdb62fc061c/32226547984.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a4511bb038471b76b5ce0630ee8c1ea0/33486040804.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/132886b26b994296e594dd1ea364fc25/49347381693.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/33948148385.pdfIn PDF document text
    • http://nmways.com/uploads/fckupload/file/xukono.pdfIn PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/4f4c5cf6c03894ab945b36f2af317ed7/regunetomusatom.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/ead92af8bac7d280d50139fa128a9e42/64818264547.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/98214154492.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/045638031b474ad696b74d61432f18c5/xosexejimolonifow.pdfIn PDF document text
    • http://veitali.com/upload/files/jadixojemanifi.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/rewudu.pdfIn PDF document text
    • http://metisentry.net/ckfinder/userfiles/files/90222980188.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e469157c54---41187702590.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3bd519b63d---97889192966.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/3l7vb3j2t28pbmvcrdbr40hqku/98817392221.pdfIn PDF document text
    • http://sterenstein.ru/userfiles/file/vukatuparedikor.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/68758646415.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=motor+winding+data+book+pdf+in+hindiPDF 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_off0000d791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD791 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 16388 bytes
SHA-256: 5690f76d6bca857f9e9c3da42892371ee58ed02808fa1fa3111a040347e40c7c
font_02_sfnt_off000119e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E8 10740 bytes
SHA-256: dd0b0c2c3a15442958bdc7540cc881cf31e7829286139531b129c02852580e55

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