Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f565092ddd27349…

MALICIOUS

PDF

71.8 KB Created: 2021-09-05 13:36:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 162ce7e3cd324b4ea0e4b89cea56d0ea SHA-1: edde9d500aabef7c3107b0e1082458d01d0091de SHA-256: 2f565092ddd27349486725b69c437cfa4dfdfd3efa240c490afddddf68078870
176 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of external URIs and a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/5c8eefec2eb352a8f9f23af1c78a7e7a/xikotizawusegifubakovu.pdf In PDF document text
    • http://157.230.241.115/image/upload/File/jixetasefuvad.pdfPDF link annotation
    • http://ausafe.net/images/art/files/jidedakopokasipakine.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/limunaniketaz.pdfIn PDF document text
    • https://lasanisports.com/files/mazuzo.pdfIn PDF document text
    • https://bamor.org/userfiles/file/bajogodesutilemi.pdfIn PDF document text
    • http://abwninemile.com/uploads/files/83883746315.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a62386c0e---20757465081.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/kikew.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/nigeloromanewiso.pdfIn PDF document text
    • http://harringtonassociateslaw.com/Test/JabzMedicalBillingService/userfiles/file/wafonelotuwisofupage.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/75592813205.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdf377c156---gepakakinorex.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7fd0050179---82512477692.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/rajopasit.pdfIn PDF document text
    • http://stapper.de/sites/default/files/userfilesfile/77463773277.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/19416894281.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16080d4a39cd4b---83140887561.pdfIn PDF document text
    • http://mindatpeace.us/uploads/files/sunumegafod.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/dedb0c327f25d3dd9865819262d6eaf5/punejexewan.pdfIn PDF document text
    • http://ladna.pl/user_images/file/86757826035.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/772444a9f8c5da3865f763320ac0710e/movukunozewejoguga.pdfIn PDF document text
    • http://www.ciesol.com/ckfinder/userfiles/files/faxujineka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=america+the+story+of+us+episode+1+worksheet+answersPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB835 11264 bytes
SHA-256: 5409e8dbea494c50aee700657db9be4b2b66d5d184e59035415770e02b7bdb78
font_01_sfnt_off0000d29f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD29F 15368 bytes
SHA-256: 60eff1f8af3e031e105286470a1c4306d1f9eff52d83e64d42fd9249b9ca086b
font_02_sfnt_off0000f99e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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