Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e00dc0c3c9bedd4…

MALICIOUS

PDF

85.0 KB Created: 2021-07-01 21:49:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: b6415a2b733e7314c13e919d1ba4f993 SHA-1: 6d0d53cf64f985ccb80e1b041a265833309c4f29 SHA-256: 0e00dc0c3c9bedd46fc7552ebc9383272f147d23b7f69c9624bf852dcec1ee5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites, and one external URI with a UTM term suggesting profit-seeking. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is a link farm on disposable hosting, designed to redirect users. No scripts were extracted, but the overall structure suggests a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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
  • 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://allytemp.ru/uplcv?utm_term=find+profit+and+loss PDF link annotation
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091b35ae706b---6976294804.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16074b95265033---wogolowewadiwu.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8d2490055---32475091517.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0223bb9b79---tutirajakewe.pdfIn PDF document text
    • http://renovator.cz/files/file/43467246180.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d45f463c7---34204389495.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/dadezo.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/dusesuw.pdfIn PDF document text
    • http://canadanur.com/resimler/files/56903742185.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/d1c3b114dea3bfa5ce5531b63e4709c9/rezatipafumujewidudubo.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c51508485a---21531764379.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a8b3e925eee---36397991971.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a94e9c7b9c9---reboj.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea4ce33c70---57219117981.pdfIn PDF document text
    • http://pratiklinik.com/img/userfiles/files/43525244769.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a0a219f486---lezojazedubetis.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/xoraxujaditawoxa.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160947b39b6a3b---13544405075.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/wegadirolezipapojijekasuz.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160afa90d85277---namefopanezuteva.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16098356c28b9a---figivaruvuximino.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/15277791830.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f54cc19b44---52406446504.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff158587da---rimaposekajaves.pdfIn PDF document text
    • 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_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 10336 bytes
SHA-256: 4e6e6648bda35afac310c8ab2e77145e28a0785fbc72ac4a499fdf024f5a379a
font_01_sfnt_off00010203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10203 16772 bytes
SHA-256: 24c7c774d3c502cc4d4b10dd1d7332dbb6b6efb0db297b70dc0fea985982c895
font_02_sfnt_off00012d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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