Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f2229ea459bcc1…

MALICIOUS

PDF

75.9 KB Created: 2021-09-19 15:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3e5cf76a3475f042e1b7881408c1f28d SHA-1: 5fb39665a21d696029a35a128deb0286812119d5 SHA-256: 83f2229ea459bcc12aac08e5c84d7e3b7a8181f5ffcd87ede825fe27f10eda52
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one heuristic specifically identifying a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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 http://sva-jeanroze.com/xmedia/file/savasenemuxaw.pdf In PDF document text
    • https://yar-net.ru/userfiles/file/pifimibulowomurigi.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/xidixenunev.pdfIn PDF document text
    • https://lacgl.org/upload/editor/file/riwepomegegapanasubizofa.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/48856168958.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/46299250651.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/magepidozegixifid.pdfIn PDF document text
    • https://ojazzdance.fr/userfiles/file/48146838777.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9bbf2221d---nukewarefugugunaw.pdfIn PDF document text
    • https://service-panev.com/userfiles/23034726611.pdfIn PDF document text
    • http://robbes.nl/media/files/58155922524.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/vikorejesaxugolemiforeni.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/20498890428.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/53675357271.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/54524063077.pdfIn PDF document text
    • http://huzatfokozo.hu/editor_up/29742853458.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/bujujowi.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///99420603888.pdfIn PDF document text
    • http://luisacortesearchitetto.it/userfiles/files/35984326723.pdfIn PDF document text
    • http://potlista.com/file/files/45147569648.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/xesorekalufagop.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612fefcd448ca---83661074734.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091307001048.pdfIn PDF document text
    • http://nedvizhimost-v-sharm-el-sheikhe.ru/uploads/files/puviluledapujatososomunol.pdfIn PDF document text
    • http://sochi-riba.ru/ckfinder/userfiles/files/70830175057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=a+discrete+transition+to+advanced+mathematics+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_off0000c44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC44F 10888 bytes
SHA-256: 53ab35f8046c6f5a587328571c38a0aa1a9cc7cf46a2c474cc0aa1556d426c72
font_01_sfnt_off0000dd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF569 17024 bytes
SHA-256: 86a6d749529c26cab8e48a34427abbde421beb5667cb67e312e24b1bf9c3808a

Open this report in the interactive analyzer, or submit your own file for analysis.