Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bef17ffb677cd2a…

MALICIOUS

PDF

68.1 KB Created: 2021-09-09 00:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: ee6b7c18b2aabaee8f596d55dd7d408f SHA-1: 7298564e19c13fb734f07cad1e1fd51acedd9007 SHA-256: 1bef17ffb677cd2ac3642bec3c564a74bc6390d6f53dcad3dd30600f4d1d5305
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is identified as a link farm. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ijp2.com/contents/files/18619589066.pdf In PDF document text
    • http://circuitvietnamcambodge.com/hinhanh/file/wofizalosuwidarajet.pdfIn PDF document text
    • https://dalilak1.com/userfiles/file/50284354474.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/99284142786.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/19609405811.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/90410499777.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/wibafizufogakab.pdfIn PDF document text
    • http://phukientubepxinh.info/gomsu/sanpham/anh/files/31536820634.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/daponuw.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/36170344564.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/18047386319.pdfIn PDF document text
    • http://wwstationery.com/files/file/91403298689.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/zaxeri.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/17999653103.pdfIn PDF document text
    • http://ets-sptk.ru/pic/file/mowivuxiwajif.pdfIn PDF document text
    • https://maria-galland.ru/files/file/97459499965.pdfIn PDF document text
    • http://remproekt-m.ru/admin/ckfinder/userfiles/files/votonegokixanuwamezivutub.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/50077186261.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109051608069697.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/lujipigukexev.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/91589711528.pdfIn PDF document text
    • http://weiddy.com/uploads/files/202109080022416729.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16131e241ad703---rumomudopimoda.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/23984144950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=android+sounds+downloadPDF 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_off0000aecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAECD 14848 bytes
SHA-256: 63b6fab7913490e2cd6ccf51cdf58ded43d151818de8347ec1622c380688a816
font_01_sfnt_off0000d40f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40F 10176 bytes
SHA-256: a99062653daabc3898ae70484a616a1082439d75848b984ef043aa4e49d133ae
font_02_sfnt_off0000eafb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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