Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4efaa04b249367…

MALICIOUS

PDF

113.0 KB Created: 2021-06-26 20:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 20231700fe4ac62df4e643a57e6b3153 SHA-1: 2b526d27bb3b19fe86163f54036c6c0fd7152359 SHA-256: db4efaa04b24936776e927e5abe127a3719e8c836fa5ae415fb064e6fdc037db
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests these links are part of a scheme to distribute malicious content or phish users. No scripts were extracted, but the primary attack pattern involves directing users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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 https://takeorders.online/wp-content/plugins/super-forms/uploads/php/files/a4unem2le64486caf8ut4hn5dg/27389835406.pdf In PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/b61f13356f34f4e9ec22207b2b1d47d7/5283033274.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/bfe4e0c9725f5035a46617670c05e112/dujujasinegevutafalufo.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/rajozus.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/97a7b5060c4e46d92c7349d4dd9d8e42/4788457197.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa0a794efe---xewixe.pdfIn PDF document text
    • https://tort-art.ru/userfiles/file/51314398579.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/cfac36150df9bb722970030ce972802b/wudoguzixamalaj.pdfIn PDF document text
    • https://activepymes.com/pub/file/58539000382.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088a018221d0---pekarexiwidonatumolasitu.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16089022f79f6a---73748640737.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a8671dd1789---29018090879.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/kafonexaf.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/limiranedasikujew.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/83ca32533d5de1f54aa3320c62f22689/xapenokejefemajusubobim.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/dde7a7802c4ef3d9ccbc8cf534920f34/kurogifuwinofekoxegavip.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/67729598077.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/74ac4f41ffc73398ad90e2e549404319/xulexixosinisuwubugemogod.pdfIn PDF document text
    • http://arcadia6465.com/clients/f/fc/fcac8d81e62e7f23ed02b02243def538/File/sokidawemapomob.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16085344e5b918---gakovuwupoterisaguxi.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/82369475014.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/r7m92oj5cbv8il5qjjjch35ue2/newiremaresetewifobefibun.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=manor+park+guildfordPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001436c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1436C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015b79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B79 3512 bytes
SHA-256: 05bfbf737c64412ef917956e6f50419e1e1facccf0424bd07dcab6c5257ed6b3
font_02_sfnt_off0001692c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1692C 20828 bytes
SHA-256: 43df49d0aa402d84b0481f8a8ce62631fa47045ddd0495fb4c95d3a39961f7fc
font_03_sfnt_off00019f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F10 10460 bytes
SHA-256: bad14663ca7f49185df16d0e47fb8bdb508e07a3c8e4316793fc43cbb08bb301

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