Malicious PDF — malware analysis report

Static analysis result for SHA-256 772ca50058c2d2bf…

MALICIOUS

PDF

75.7 KB Created: 2021-09-06 12:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 334055235d72180bfc87de6c35c69911 SHA-1: f88ab861955e1fcd9ebd609b6ec6796ed18a3f26 SHA-256: 772ca50058c2d2bfa46f8b562283c0070327b3fbbc0040c0a3f90dbcc0be359f
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised CMS upload directories, suggesting it's designed to redirect users to malicious sites. The heuristic firings, particularly 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION', strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=pdf+editable+software+online PDF link annotation
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/40b57afa13013f3c07d624fe2f6e99c3/famifovujutekogalim.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/91405774455.pdfIn PDF document text
    • http://dejede.com/userfiles/file/90993286506.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/lotamar.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9f767c2dc---molemigeluduguk.pdfIn PDF document text
    • http://capri.lt/userfiles/files/82127745144.pdfIn PDF document text
    • http://fpsh1980.com/clients/7/7d/7de5299bd6bdc19cdd6b275c058e9c4a/File/57592208501.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/2788897896.pdfIn PDF document text
    • https://edmaker.site/wp-content/plugins/super-forms/uploads/php/files/2b66155af49e76f0e236435d1654a338/67877873782.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/filedurevovekesuruval.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///58409789593.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/gerezuwuridowadafibaxo.pdfIn PDF document text
    • http://runo34.ru/attachments/file/68125262748.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/22317019828.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/38032322845.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/76236035214.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/dd10114214734dae0291897651cf9d09/26490673958.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/o0ci02r63r06fr0ius0l4k06ko/fipakesesefejexugez.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ca21bfe83a22ca21d9dcf245ee478a81/zizuxuvepafipimixi.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/tojomazexideresopuwubegov.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/18146033463.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/25695076373.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35E 10576 bytes
SHA-256: 8194a17c8992a422d4e53b3d8bef911c9a0e4d2e53655ea46babc90fb44bacce
font_01_sfnt_off0000dbaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAF 17912 bytes
SHA-256: 70f110f1ffc74e48d95e319ee3fd95ae1cfb85b5530f0b5385fab9108cb6d7fc
font_02_sfnt_off00010948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10948 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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