Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ddd27aa35b844c…

MALICIOUS

PDF

77.5 KB Created: 2021-08-15 08:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: b8b8ab42701a3ff8199df91f08e178b0 SHA-1: 8ef290eccbb554fa25158a0714bbd6ccd401ba73 SHA-256: 14ddd27aa35b844c94b8b849aaaca6e26ae1acc80b771d127aaaf44fd22cfd5f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress upload directories and disposable hosting sites, likely to distribute further malware or conduct phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, aligning with T1566.001 (Spearphishing Attachment) as a likely initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a388f3ec8bd---zebojojelirejijuzi.pdf In PDF document text
    • http://progfin.pl/userfiles/file/78295046699.pdfIn PDF document text
    • http://statewideroofservices.com/clients/b/b8/b825a24af54c157c196cf52173d75bf0/File/raverokibevoxewo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8f730fa94---56597296248.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea6f95db02---18885962356.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c787c4b664b---tokutaridetilotuji.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/27195714339.pdfIn PDF document text
    • http://hargrovefamilyreunions.com/clients/16272/File/wudulemiralatite.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd07dd85c5---84946370432.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/kuzoroxutalukinudi.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/p60oqv806a6ugg9hsshdcalgn7/vufubalikobapu.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/fosabijavizevox.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/kitnc64lpet5r2mgb17n6qmen3/wuvipeterariwepusibemu.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/nalibedenikuke.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16110fe76f27cf---vegilar.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/me1m5oh2poe116ltak6qh6gnt4/vaxizuxubedafivarilujuxot.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/14284532383.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/1623556637.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/xopopabiz.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/4506756163.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/penesuzutiguver.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/8faf7649f53a5efe9fae304112fdc59a/ziwod.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f505e7c0db0---wakuxegokisudibuguvuwutiz.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/duzimerogidogomagabik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=subway+surfers+unblocked+gamePDF 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_off0000c9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE201 11236 bytes
SHA-256: 43e6b5459eacf9841a2e1ecccfc902ec32b43d5d8443b72b984f4fc1dbda8e72
font_02_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 16624 bytes
SHA-256: 7c397c38215cd832602a0ab97beffb5f6fba9f953eaa733e13ac0303c25c2203

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