Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d87165c65fb8dc…

MALICIOUS

PDF

62.3 KB Created: 2021-09-25 02:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5a07cc54bcda3fcd306482cacbc713f4 SHA-1: f8dbfe898e78bab2f5f4b67e59e689f0a1f6c889 SHA-256: 14d87165c65fb8dcc717e92adf7829f329e923742271b2b4f54f784e436ef172
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5428

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
  • 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
  • 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://wojczak.pl/userfiles/file/53076229558.pdf In PDF document text
    • http://jewelry-shopping-city.com/uploads/files/202109041400488440.pdfIn PDF document text
    • https://bilegt.mn/userfiles/files/36980011530.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/52386298734.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/zujazogezumugam.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/3tnsdpsmm3k4i5afefr6aah1tp/17479425980.pdfIn PDF document text
    • http://art-wonders.com/ckeditor/ckfinder/core/connector/php/uploads/files/92702996032.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/4f9525b06e65007f910be1a72196d645/86574187984.pdfIn PDF document text
    • http://neoclassicalmansions.com/uplds/file/tabojexejuzoxebojofigoka.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/popasewozoj.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130a492d4fd5---28416222782.pdfIn PDF document text
    • http://mamnonkitty.com/webroot/img/posts/files/jodivix.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/virixusegeribewewuf.pdfIn PDF document text
    • https://gameclub.by/uploads/files/korisobodomesebirobul.pdfIn PDF document text
    • http://fundacjahfg.pl/upload/file/38634141830.pdfIn PDF document text
    • https://vinacoma3.vn/userfiles/file/45700819467.pdfIn PDF document text
    • https://perfectsextherapy.com/public_html/userfiles/file/pekazatekuwapiwo.pdfIn PDF document text
    • http://arredamentoambienti.it/img/file/78545107181.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/rozag.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/6567839612.pdfIn PDF document text
    • http://goref.ru/files/file/legokosiropidegem.pdfIn PDF document text
    • http://ingmontagna.com/userfiles/files/xafopobukopilavixejasov.pdfIn PDF document text
    • http://budgettranslation.hu/sites/default/files/file/kawatozirefob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=calendars+for+android+tabletsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB098 16568 bytes
SHA-256: d0e2b99e9566eaa0e53a388e83c31e3bc7ec22438520fc932c611879c0c6046c
font_01_sfnt_off0000db13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB13 10516 bytes
SHA-256: e27a3a1e9bb23b4e696ac9d18a345c3b313552439459200f730fe7fd1c69da3e

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