Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e340c2a3de39d21…

MALICIOUS

PDF

130.5 KB Created: 2021-06-27 18:08:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ac62e04ca19b1262c70d3f75ab268683 SHA-1: 82dd1cca5693026fc3243f4b7421ad7e7f692023 SHA-256: 4e340c2a3de39d211675fd97a564df1eef3f8743352f7c75b1a9e3b4df38e89e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or download of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=where+to+watch+heroes+rising PDF link annotation
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d07a6880373a723855b5d3687fd1a227/4002038666.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/4frsuffnvv4idisokrq0gohsc1/nedufosabomujabovolimob.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/5d68b54778bfc88778ba0420ba4907f4/52558871584.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/69959467453.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/menelebimalenenagave.pdfIn PDF document text
    • http://latexindia.com/userfiles/file/3856279361.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/dalipifu.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16093a69baf72d---63826891571.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/guwipa.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdc78e46b3---gofusatumoru.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/30a4f68e66fb8bc1b1e91772585a3748/22084587497.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/71037342106.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/73f3c338123afcad57cb063af8378375/23935920871.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c94a4aa495---66472978427.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ce084eb7b---delikozirijukakejowabu.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071fbc747ec5---68231626106.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/29ba705f149161effd9406053a3ee8de/83892943671.pdfIn PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/boxemat.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160720ae06ac4e---63515806346.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/cabebab5d743c4229f30e639654887a5/dusubovamifex.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c238d528cae---biwurodugemotomitoxavuxar.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/gozemaloxazuzeforuvabulej.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/wizunixo.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_off00015342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15342 16456 bytes
SHA-256: b567351d8817b452d7c2fb9a0144519bfd530866bceb2805c1f9ef2299257e42
font_01_sfnt_off00016999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16999 10540 bytes
SHA-256: 1f262c92d522429d23d28d7d82d8957bcd3e0ed5ab8c00fd7b89caeaf5dea435
font_02_sfnt_off000181a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181A8 16604 bytes
SHA-256: 687b927776092ed0a0f779e7dbe829adf7de23e040059d6d696811a8a56c76a2
font_03_sfnt_off0001b4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4D5 18236 bytes
SHA-256: 0a9460246f9146c03b574d9064941e2bd385cef98513edd38abfa51de70e6d33
font_04_sfnt_off0001e482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E482 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.