Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a3d1fcbf4f7ebf…

MALICIOUS

PDF

72.6 KB Created: 2021-07-01 18:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 84db840844e6e15a7894ddf49c3400aa SHA-1: 299279917609ef5f742540c4a894303ef8146111 SHA-256: 52a3d1fcbf4f7ebfb7ac08d88b8800ba5fb4f3caca85f7885f795cc1be328a37
96 Risk Score

Malware Insights

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

The ML classifier and PDF heuristics indicate malicious intent, specifically identifying the document as a link farm hosted on compromised CMS uploads and disposable domains. The embedded URLs likely serve as lures for phishing or to download further malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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://614move.com/clients/4890/File/vogejegunixadu.pdf In PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/3d61453213d87aa63e2fd33117e18c19/66678057258.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/27601125405.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4138cbca7---31600691126.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad789ce5f18---72461908627.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/3e37f6ad713fb099155c92e86681a2ab/63245550931.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/12roosqplkoahuo8n7mhodcl40/tumipedinipagizijo.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/3cc11642821503ea701ad57385db3c0b/55928437445.pdfIn PDF document text
    • http://nakatka.com/files/file/tovaboxisizonuvazo.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/36474313346.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/nrhu8plj0c29tt8fsenv2pd7gd/senokovidorejob.pdfIn PDF document text
    • http://tai-yang.tw/taiyang/upload/file/77216569755.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942b4b9383b---mobikebe.pdfIn PDF document text
    • http://www.buildingmalawi.com/images/uploaded/documents/64324436063.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/b0c49556150266516b7d692bd4851b62/xerurizerimazaxotutiji.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/3n9pvi5q4ncp7amgf484055bct/rujinatokotezaxunowitexi.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/36593344906.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/zifizitajunobifa.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072a1c7bdee0---49599252372.pdfIn PDF document text
    • http://fujiya-la.com/uploads/files/tevukuravetixutuj.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/3lq2fvgs24b9h11kvga82vvsu6/72288379658.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/takomogubunovis.pdfIn PDF document text
    • http://ibb-online.ru/f/file/19456416731.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/75857380915.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=a+and+a+balletPDF 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_off0000b993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB993 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A9 9884 bytes
SHA-256: 50acbe1cf609bcf3a623c4bd82c0b64a6856cd3d3ae1a79b39d6760fbe4bf001
font_02_sfnt_off0000e786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE786 17548 bytes
SHA-256: 0384e71b01e7399662123936428bd416054792b544b1e937b3262bbd622a0488

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