Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e30d035c58e3152…

MALICIOUS

PDF

84.0 KB Created: 2021-09-20 17:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 506aa51595ca71cf76399d46fd302579 SHA-1: a9663d2f56d5b681aa4577f51839e8e70decac30 SHA-256: 8e30d035c58e3152f7b565e0c374d67482f4b85fec89b3ca32b79a154a97c605
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of embedded JavaScript and a high ML classifier score further support its malicious nature, likely serving as a phishing lure or a distribution point for further malware. ClamAV detection confirms this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=gun+games+unblocked PDF link annotation
    • http://fioredda.com/userfiles/files/75734654078.pdfIn PDF document text
    • http://dlugopis.kbo.pl/ckfinder/userfiles/files/xafalesitibelatad.pdfIn PDF document text
    • http://phucuongplus.com/upload/files/7566325448.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/99232687828.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/wekef.pdfIn PDF document text
    • https://5uempat.com/contents/files/49024110426.pdfIn PDF document text
    • https://santevita-bg.com/ckfinder/userfiles/files/9821526781.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/vamunixofu.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/topimilasa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a7a2a5c79---91695063774.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161452eb5999e4---20295764672.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/6ed2b1l9so2f39bflpivcprkm4/51455707787.pdfIn PDF document text
    • http://studioiulianella.it/userfiles/files/jedenemogepapiferosob.pdfIn PDF document text
    • https://vanphongphamhienluong.com/upload/files/nixufenamenubefovapade.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202109160412064726.pdfIn PDF document text
    • https://www.prshots.com/ckfinder/userfiles/files/34843135604.pdfIn PDF document text
    • https://actsonics.com/uploads/files/202109200544417228.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/vedugovoguzo.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/299683462.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/zomafufovapelibagewi.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/5dc151f71054b25b79b78d7fbe4780d2/97296226951.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/suwab.pdfIn PDF document text
    • https://kalashad.com/userfiles/file/fukolajujofe.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_off0000e2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB4 18136 bytes
SHA-256: 3e568b424dc3e41d9734746b2895801c5b8665ef8d88dac688370613608cbf73
font_02_sfnt_off0001299f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 10796 bytes
SHA-256: 9d354b29449ea1520cfaeb2c21e62479e24096220d29591155f552be0f5c139e

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