Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcdec3be4fe6b73…

MALICIOUS

PDF

74.3 KB Created: 2021-09-07 04:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 571c884271d7510eb910c0013411a4bd SHA-1: b07a1c38d0f5bee0f678de430e6ea4cdd467b7ed SHA-256: 0bcdec3be4fe6b73e46b560422c8aca975f4b0c06ab2fcfd57c62a3cda619699
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://ideaoneinteriors.com/images/bulk_images/files/51468851495.pdf In PDF document text
    • https://royal-art.pl/uploads/userfiles/files/pogifojozifizedegumedo.pdfIn PDF document text
    • https://alcoquimicos.com/ckfinder/userfiles/files/41537669133.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/vudenesixanopagerokekixan.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4aeeea9f81---gidafeduvegodigugubivi.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c812a5ca---masuduk.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d3604937dcc---lozogadilupogor.pdfIn PDF document text
    • https://jcmimoveis.com/userfiles/file/tupemakaloxov.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1612be89251cca---difamokezasojamaxiwud.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f47de0f006bee30bd039fe99eba9328/zitimokiwetidul.pdfIn PDF document text
    • https://zd-zeta.com/uploads/files/202108281449542562.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/58079863466.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/52f89dd85bf72b9052acc957d9fdb4fa/87820687688.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/4640477084.pdfIn PDF document text
    • http://salkim.com/userfiles/file/lubewibudevumipazorido.pdfIn PDF document text
    • http://zerosquareonline.com/file/32621748875.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/30468937937.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160809df46110c---rurazejeno.pdfIn PDF document text
    • http://markone-tools.com/upload/files/viwiduwalofoxuwesuponuda.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///kujiwazenupivutogutozanam.pdfIn PDF document text
    • http://kasystemofkarate.com/clients/861259/File/fufatesomabodexozedafegu.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/kakode.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/bp5p06fogghlt2g03jcakbs4m9/32122666805.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/3e7483a4b538a4ade2f7cadb9616e6d2/12988410641.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xifituxufazudezar.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/eb356786540f4218e38224853fe41d85/zevarosowijumowex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=vector+analysis+pdf+notesPDF 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_off0000beed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEED 17580 bytes
SHA-256: c5c6d811a42a3362ae3fcef06b4d8393de6f867f8db6be155ee231cc60652f25
font_01_sfnt_off0000eb03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB03 10696 bytes
SHA-256: 33ea00440a1e8ff24769136b6471aa223487e54a6fa37d5cc8187b01c6aac141
font_02_sfnt_off000103b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1