Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee802b016e5edf5…

MALICIOUS

PDF

83.4 KB Created: 2021-06-29 14:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: a1e139926768b5e447814ae4514d867b SHA-1: 16d52e5a8f175d79c9c527fc9e14445986347e9d SHA-256: dee802b016e5edf5809fe77529090238dffc6f8f0629cb368675bef680c33c0b
96 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that point to compromised WordPress sites, indicating it functions as a link farm. The ML classifier strongly suggests malicious intent, and the structure of the links points towards phishing or malware distribution. No scripts were extracted, but the primary attack pattern is the redirection of users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://medvor.ru/uplcv?utm_term=a4+height+mm PDF link annotation
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a670cbc6e0e---78942610836.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608657574bfd5---kuranuvinozaguzifulu.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/m6eqlfr4sdnr6354hhpar8cca6/66151201808.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b488d8cacac---53169280589.pdfIn PDF document text
    • http://www.prieteniitehnicii.ro/documente/file/15442894016.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c00ef18acf9---90136404513.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ltuqqqp3h17um1mgrah9j8f6rt/28914356136.pdfIn PDF document text
    • http://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/26615638104.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6321889c2---vezidunerapuloroledi.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/5223834945.pdfIn PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/20b36546ba3a4a188b4c9fd4e41a5749/72666058016.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/rezewotazogewadixatitugew.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/83c0893899d23ba81816016e1afd64ae/85942395747.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7269798e83---44895563631.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3801cf99e---65617173707.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/sofowonodapi.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf39126225---xuvisakegolawixerudedavu.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d64f89c7405---4998259285.pdfIn PDF document text
    • http://deurenhanger.nl/userfiles/file/padisamotimozipowubaw.pdfIn PDF document text
    • http://investin-khj.ir/ckfinder/userfiles/files/jodev.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/duvuparetugot.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608c117ada87a---narosatujewo.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/1596347337.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_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7D 17040 bytes
SHA-256: dc27861d5ba6dba26724c9437f3c8cf4ef90ecd8b1854374d6c6af1e292dd32d
font_02_sfnt_off00012b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B00 9916 bytes
SHA-256: 17b28c5c3cadbfffb5520de8a0d7da902480aba04a6fc052a98734c49e31d553