Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9086a1144b19d9…

MALICIOUS

PDF

67.7 KB Created: 2021-09-25 04:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: fccbc42a1e5eae49d94df63cd956eea9 SHA-1: 232e17587ad6d65fa5faf9ec2ce49264c1a3e4b0 SHA-256: be9086a1144b19d9af282e121e6bb3d889c16eba52cd09d23eea5f14aa7e584d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure and embedded URLs suggest a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dolphinkorea.com/files/files/besukexudexupi.pdf In PDF document text
    • https://tomaszbizon.pl/web/uploads/files/81352219710.pdfIn PDF document text
    • http://dh-cell.net/ckfinder/userfiles/files/jibokosetisa.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/73201593260.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/sovasigepavokewaket.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/vozanomokej.pdfIn PDF document text
    • http://pskov.agisinfo.ru/uploads/content/files/31939677795.pdfIn PDF document text
    • https://tigapilar.com/upload/files/zibiwozoraxujalenos.pdfIn PDF document text
    • https://fishuntpesca.it/file/gamizoberuronute.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/xesajapaxuketenagalat.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/64378777377.pdfIn PDF document text
    • https://alpinismbihor.ro/app/webroot/files/userfiles/files/47968515927.pdfIn PDF document text
    • https://ofcourselc.com/admin/uploadsfile/2128854284.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/mukapubamijezekigeririnov.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/nedidabug.pdfIn PDF document text
    • https://pataniforum.com/admin/jquery/ckfinder/userfiles/files/kupuwobixuzuwiniv.pdfIn PDF document text
    • https://timavoshipsupply.it/userfiles/file/69310535611.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=website+blocker+for+chrome+androidPDF 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_off0000a7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E3 10964 bytes
SHA-256: 7dc4f98adeeb4dec8cd8368e00e2d38543ad6cc0def4cd75b5d1dd76aa141d37
font_01_sfnt_off0000c12e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000d940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD940 15932 bytes
SHA-256: 2524bbf6a017ecc0bcb6333e5b89cedc106752975bc2b93249df0cecec670530

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