Malicious PDF — malware analysis report

Static analysis result for SHA-256 07547ad5f7284fdf…

MALICIOUS

PDF

72.3 KB Created: 2021-09-19 00:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8f4ce913b43737ec08dc4692fdbf5f73 SHA-1: d9d446ae67c6dbb1aa624970ef916db61ccbcfa0 SHA-256: 07547ad5f7284fdfba97361808f1207a878f00d3eccbe5085accf163b62bde1b
134 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, suggesting it's designed to redirect users to potentially harmful websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports that the PDF acts as a link farm, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • 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://synerhu.ru/uplcv?utm_term=hollywood+latest+movies+torrent+magnet PDF link annotation
    • http://onlytech-tunisie.com/userfiles/file/77973710790.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613e389642f73---48874212843.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/gitajurizuk.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/tuponitiziniperowox.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/wekigivi.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac387e7dca---zinoji.pdfIn PDF document text
    • http://ned.ru/uploads/files/lusovexovibetinesanomuti.pdfIn PDF document text
    • https://dp-silver.com/userfiles/file/43979425184.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59619853511.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/makimevadugukojefop.pdfIn PDF document text
    • http://xy-interior.com/uploads/files/202109170407188269.pdfIn PDF document text
    • https://djecijagarderoba.me/userfiles/file/kirufevivakupapeta.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/36986970680.pdfIn PDF document text
    • http://konemara.hu/userfiles/file/vudulefekujajijomi.pdfIn PDF document text
    • http://hanlacsclub.com/ckupload/files/wudagubomomixawimamok.pdfIn PDF document text
    • https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/ruxororubuxofofopafokuni.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/setawego.pdfIn PDF document text
    • http://www.sindafaz.com.br/admin/editor/ckfinder/userfiles/files/jubiberedifem.pdfIn PDF document text
    • https://clinicscrm.com/img/files/kaxegiberujedijadi.pdfIn PDF document text
    • http://yves-segers.be/userfiles/files/witupabufurinajonosetu.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/botalem.pdfIn PDF document text
    • https://saintarseny.ca/sites/saintarseny.ca/files/file/wetajonisojexola.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/48438060157.pdfIn PDF document text
    • http://paulgraphics.paulsfashion.in/files/vodaxuxujowajotov.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/misagujoxopepuxelorip.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_off0000ba8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A4 10848 bytes
SHA-256: 103f43cb97014caba335cc36eb42bedb180962c7d0ba28055624374b72910b9d
font_02_sfnt_off0000eb72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB72 15924 bytes
SHA-256: 62b0a1699c1668a2aa9b6efad37d52910f2d55da48d8374dfba7728e934fe0cb