Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04a6e1617106335…

MALICIOUS

PDF

72.9 KB Created: 2021-09-01 14:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6609e8dccf325bbd5b23ee57bf67a46b SHA-1: da9159bf5e5c49f67237868f48d8eff514bd7a2e SHA-256: c04a6e1617106335a1db5cdca1758e77054f8b412bbe714d339b9eb7b1513ca8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate that this document is likely part of a phishing campaign, attempting to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://drafthe.ru/uplcv?utm_term=ear+feels+clogged+and+whooshing+sound PDF link annotation
    • http://intranet.uts.edu.co/portal/app/ckfinder/userfiles/files/kovilikalufuvebog.pdfIn PDF document text
    • http://premiercontractinginc.com/files/file/kozokixolilo.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/9vdqjld6th1g7e03ld4tuerpr5/31943590234.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/ludikukibadaviwur.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/89719850272.pdfIn PDF document text
    • http://quartierdete.fr/uploads/fckeditor/file/7554331475.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/d77bef4508a6f0ae06603a28803491e6/56096712579.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a687574651---90480813425.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/788124243.pdfIn PDF document text
    • http://darstin.com/userfiles/files/lomefet.pdfIn PDF document text
    • https://sona3elkhair.com/userfiles/file/bulifadoxomukazilipavo.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/b1850d72e0481c73501e447033c7a17b/towamodovolone.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/nepegozoritaviwis.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6f9650f62e---mibunazapuzer.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/tavalakozarol.pdfIn PDF document text
    • http://nagyberki.hu/sites/default/files/fck_uploads/file/56679107386.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/fiden.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/95828e04f1f1e28eebf122ff8426fda7/75733658054.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/48692191401.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d02d62d96a---rajapoxekunuganeriveleze.pdfIn PDF document text
    • http://csc025.com/userfiles/file/20210829102433_cgodpn.pdfIn PDF document text
    • http://i-dron.cz/data/file/23072257278.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d9dc4d5472---wefoveki.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc2f6e02e63---gapitovulod.pdfIn PDF document text
    • http://jan-fotografie.nl/upload/files/18241261212.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_off0000bca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 15396 bytes
SHA-256: 652514a22dd00c13ae52037e5ef9cd49020cf9fa80bfe5a06cd7cec580c8ecfe
font_02_sfnt_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 10828 bytes
SHA-256: d1e0e30461fb02f6a60599399fb95d7af00f9f4fe416ee3db84ef556119b615f

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