Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e937a0e156febf3…

MALICIOUS

PDF

105.4 KB Created: 2021-06-27 14:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: afacba559ce2bd884c97c036a10fa5e6 SHA-1: 2a5d0c513d47bd1a9757d321d1a5cfc0b644cb45 SHA-256: 5e937a0e156febf35042271e07fedfc60c60247d23b71bb7cec06ff4c2fe6515
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which appear to be compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9687

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://archism.ru/uplcv?utm_term=definition+of+a+vagrant PDF link annotation
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/m7nkee948u20cfigmb91fj2dv1/45759086566.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/54756088688.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/qppfv24osldmlm8e8rpvd4216j/fuwoduvokinapax.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/495126960799699610a2854e992e0e5e/zexifedoridipobax.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/f499b752b70aab4432a0889f9ea6a65d/lulit.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/0214b279238f670bc2fe52d7a528790a/26695432580.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca6592c6d7---56480737361.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2df75acea6---laxaxisotosawizuzemi.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/087b07dfec425b1715d36497579bf307/moginoremis.pdfIn PDF document text
    • https://menu2uplus.com/images/file/57493616791.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d58e1e90a5---lofifusenufimovu.pdfIn PDF document text
    • https://telenovella-bg.com/files/29798052470.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/51147560805.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/6d58g3ghj0ma7hoggbr68l7gc2/ditubavubajizizovevigi.pdfIn PDF document text
    • http://el-system.jp/uploads/2012/files/kazulaletemixivegaw.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c4db596c716---wameganomoluvidifipef.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/tusureregidofidur.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/54f3344f2518d57c611d8b1c7dfbff0b/59280370543.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/d5626f8ea04e65f5263b5fc9305dc121/75678936929.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084eccfba408---64483813461.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/7aedd8e573aa34e53734bcb0a3d65ea1/vadusetimize.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/71ebf5f06bd89fc05ca31500a0e98d93/piwafukudofumekawebox.pdfIn PDF document text
    • http://zabradli-znerezu.cz/userfiles/file/makopapevoxobopobovumin.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/tifedavuxuxodub.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 19832 bytes
SHA-256: b0a51fbb756c7d7b4708815410178bc1dc6052877b09077349b1efec3ff4e61c
font_01_sfnt_off000118d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D5 25280 bytes
SHA-256: 2acabb97159b8c67bcc98b9e37d4aaed6404076c3c4c42563d143338422ba964
font_02_sfnt_off00015842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15842 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001704f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1704F 3928 bytes
SHA-256: 1af2554d7d90979ecd71d04e574c104d2b211e9d92282734bffed86b8b8c8dfa
font_04_sfnt_off00017ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17ED6 10240 bytes
SHA-256: ce128c07f8a1e03b302809b80e1663a0502d74c38f9dcfcb75fe5d467efe1d7f

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