Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ceadd9525cd66fd…

MALICIOUS

PDF

93.8 KB Created: 2021-08-21 23:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 997fc46594ab02d30b03378ed75ed80c SHA-1: ffd4808cb285daa6c076c16e21cf865248f1bf0a SHA-256: 0ceadd9525cd66fd1d42d2764cdf0fa72293dfd23dba6d964324f91fdd346e6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://krisoc.ru/uplcv?utm_term=msp+hack+sans+verification+humaine+rapide+gratuit PDF link annotation
    • http://plasy.com/uploads/file/nixugitudinurugalij.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/43113171733.pdfIn PDF document text
    • https://forssh.com/userfiles/file/91828534869.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826df3f1523---sorevopimoniva.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606f69da13274---zorod.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/16071d88a438d2---95296688610.pdfIn PDF document text
    • https://get-insurance.in/ckfinder/userfiles/files/91583293326.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/36167742264.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/0k7u735srfc2u686ku1u11btv1/saxusonizojigokuwe.pdfIn PDF document text
    • https://inncredel.com/uploads/95289907309.pdfIn PDF document text
    • https://mamap.in/ci/userfiles/files/17072031261.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/kimatetenomaf.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a47a3ccea27---80359194209.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/07846a30ac837027324a6e80ab2fdca0/90615325138.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16114561392e84---27857606269.pdfIn PDF document text
    • http://cci100.com/clients/57496/File/tisavawali.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/o4idvb2hsutn31shl3adsn02d7/31392734141.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/507302085.pdfIn PDF document text
    • http://ourhkg.com/UPFILE/userfiles/files/kuzetugovufegut.pdfIn PDF document text
    • https://nanosoft.mn/images/content/File/roxemewabasotaxa.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/xowafowesububopatin.pdfIn PDF document text
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678db74395---52765532110.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bd0142734a137bcafda8f81af68cb459/sepeputujelalavotixo.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/kikaterovadev.pdfIn PDF document text
    • http://srtcivilnorth.com/ckeditor_file/files/lalogenanujelomo.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_off0000fad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD7 23596 bytes
SHA-256: 6829591749491bb3dae0607dcd7bc3078a6bdf4387f678adf82ffa8cced528de
font_01_sfnt_off00013601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13601 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E18 11272 bytes
SHA-256: a08fbcefd7dff70824250013f33c14dfe731f7df5c67736dbcba191ecac7585d

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