Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1e8cf865c9610e…

MALICIOUS

PDF

74.1 KB Created: 2021-06-28 07:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9e7d2ce3b0613e498a55c9f112c6b03c SHA-1: 595fab1309b3bd991b4850d914861fcb4202c651 SHA-256: 2c1e8cf865c9610e0ea8035109777775ca853f2fd66b8cc347af4130c2a52ae1
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or credential harvesting attempt. It contains a large number of links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of numerous external links is a strong indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • 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://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aa18b865ad---94460227588.pdf In PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/69876456240.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/2c22bb82fde178f1e9bc606696df258f/lilekuwelirumom.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cbb7cabf8---91152966484.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/43192191207.pdfIn PDF document text
    • https://hogozaty.com/ckfinder/userfiles/files/voxexagutokudukusilazewar.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ajpvf2lcr45hn6teuk3ml71op5/41919566010.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/46695778276.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6f8de107e---lixefotesanetuxomo.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/35ff81e96a5e2ac228284a945cad9622/jinivifonavefok.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/0c108a281db644dae992bcc8cf9a5d16/kinom.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085c3c068377---66552365094.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/34373858554.pdfIn PDF document text
    • https://cristalensi.com/public/File/15928842402.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/1b7697d366e6eb9b839bfa89744c505b/kimebobafozusiganag.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/dojepuku.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/pazakasesonovuguverun.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/enhats6jcb52e8q6n3g0dondg7/soribebovoporetaxejuzaxa.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/dopidokizupevow.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f9130a672d---3158358559.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/47af007355433bd6ce9361d3e35d288f/97712650105.pdfIn PDF document text
    • http://compufoxmail.com/userfiles/file/95555863088.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/lba398b182igf5n4225si4rkn4/23314268084.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/gamofuzelegozadalubivebo.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160913e86abbbe---14491467400.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/e914fca71a9acc4f1956489172cb82f0/40809350133.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=evangelical+free+church+of+canadaPDF 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_off0000bf36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF36 16692 bytes
SHA-256: 6fc287303e86b08cf9a22ca555a5760ba7ef82aec42a6a9e8bc62e29e71d8c1c
font_01_sfnt_off0000eade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADE 10636 bytes
SHA-256: 1abf28616954a31cb8ef1ca4f6c368ae5ca003152c8e464b9db6c72bd6f2b96d
font_02_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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