Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a04c9280462fef1…

MALICIOUS

PDF

82.7 KB Created: 2021-09-05 07:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a939e56bdba814d89b65c0eafa9ec0c SHA-1: 9bcdf0a8b1dbd8ce81166b55ae4871b1e6eba515 SHA-256: 7a04c9280462fef11136f1741a329e254343c1438c41d49158e2c4a17c27ad06
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/0uc1262rvfpg8he3cebivi3rb0/sepamitofemigobawefa.pdf In PDF document text
    • http://studiolaviano.it/userfiles/files/75546445614.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b96f861a9b---favemado.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d0n1kngp053nffja6ce28s2vj6/gofilarutovujovuzafe.pdfIn PDF document text
    • http://ggmtc.net/userfiles/files/10291922785.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b0612eb18---81406966366.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/aib1jf0iesad1m1ge8gfmkg2i4/bebutedinavorimumanogoxes.pdfIn PDF document text
    • http://c-six.it/userfiles/files/mupelawekenonefax.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/33620868247.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e507a38a9d2---71307449593.pdfIn PDF document text
    • http://msiutilities.biz/documents/mutokato.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/xevisekif.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c76309ab2a---96260428675.pdfIn PDF document text
    • https://orangerun.re/photo/files/17531731791.pdfIn PDF document text
    • http://mevlanaasm.com/resimler/files/vapironuzitusotewuno.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/e82a394ec65e8095f5ef2783e81ef266/xezovefobaxajor.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/41149826440.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4389906cc6---15034661262.pdfIn PDF document text
    • http://quaint-house.com/images/blog//file/61900860107.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/tubefinubemisira.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160757c92a1314---kunasibuxenurasizuwemibe.pdfIn PDF document text
    • http://thesetnews.com/images/fckeditor/file/14360995821.pdfIn PDF document text
    • https://muzeumkonstancina.pl/attachments/file/3868954881.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/nazukatokemolafuxaja.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/929759941.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=laravel+documentation+5.8+part-1+pdfPDF 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_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF41 11228 bytes
SHA-256: 991d3bee70ba4c1c6d12fd636f13003c83baf0aa33ef7db8abd3138463dec897
font_02_sfnt_off000109a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A3 19436 bytes
SHA-256: efac14d5914859b5147b8be36913079631fafef0d706a4826c2982988ea2488b