Malicious PDF — malware analysis report

Static analysis result for SHA-256 014232589b929b7e…

MALICIOUS

PDF

85.5 KB Created: 2021-08-24 15:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8c4e72942a8b17ff86fd618c0fe019cc SHA-1: 262dcad1ad4a0f3cd8ef93f0121b06bd630314f9 SHA-256: 014232589b929b7e3de5d3390c50e650e4a6c6e929bdaa549c2659ecdf479781
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609893b6c1c31---21433497769.pdf In PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/3e2c9ee6d13fc8adfe0b410ca6012c88/tunotejopilegivogonu.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16086b03b0c582---24769987821.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/pojepup.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/132d86a7000a97c737748e950fcc93ba/zoduda.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/derexasexipatukafine.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/xamulepadofavo.pdfIn PDF document text
    • https://cornwallstaffagency.com/userfiles/file/kakegutigovemagurudu.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/4868530175.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f09cefb6---44114116388.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/zopibaguziwi.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/i4vbtrmb7u4oueenbi5tbus7j8/87173086088.pdfIn PDF document text
    • http://smsgurugram.com/miet/assets/files/vajiduxilolumazaxijedi.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090bc6888d81---fikiforokizog.pdfIn PDF document text
    • https://esportenerd.com/app/webroot/ckfinder/userfiles/files/68007107732.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1608fcc4fad173---3901488622.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/masukixaf.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbaf83afc---16502827864.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/88670014253.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6fbee18c4a---toxigumobapamodakupo.pdfIn PDF document text
    • http://fairmonteast1975.com/clients/0/01/014dde3c838f86fef2ac1d31a86c415b/File/4682266834.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160955517ee8e0---77127275498.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/82265880972.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da547282b19---zemopejijovolapij.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/72311124038.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=marketing+management+isPDF 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_off0000eca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA8 16324 bytes
SHA-256: e9144c1545dcc6075b46804c8e518fe65afb47167017a83dd3c6d49fcb124562
font_01_sfnt_off0001172a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F41 10368 bytes
SHA-256: 54c400a7f3d3f9584f0b17712306af9c522278b8b45129e28444392cee84c1e4