Malicious PDF — malware analysis report

Static analysis result for SHA-256 d63cdd72f26955b4…

MALICIOUS

PDF

83.6 KB Created: 2021-06-26 06:36:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 40e900c650c34c309ac4444fd5c0df3a SHA-1: 15e5c2239fe7e90e64a2dcc51e0124a79410068a SHA-256: d63cdd72f26955b44883f42c1d84319bf2b6d1bd3fd3c353653b97185add960d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to host and distribute further malicious content. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to trick the user into performing an action, likely related to payment or a request, which aligns with phishing or scamming tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://calmoinc.com/upload/editor/file/powunadugotomuzezawibum.pdf In PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609faca323e8c---letoxuxepovepetelofoz.pdfIn PDF document text
    • http://blueyee.com/upload/file/30033529868.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609493fa824b7---xilide.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vq4hmahabfdo9q0mhkflpau8v5/duwelibinetavunojowaduz.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/a1g3mvcoapb4vefpg872lrvs5q/3927738077.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d049d4316---27266303469.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/00e4499a786ef802f6a7cc3eb6c926db/13073111463.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-6-6/20210606064615957586.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/23241258675.pdfIn PDF document text
    • http://beijinghuojia.cn/userfiles/file/naroxelatomapujamu.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/kojul.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/14171539705.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/772db180baac0cdbe40c2aa6d0d2ac3d/makizodowivufa.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876fd9dcb37---80053912989.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c9fbef125---dujusulut.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2aa19a9ec---xiluxujalewejabarudenomad.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/08977cc318d3983097514952b3f5069a/lomabifeworoven.pdfIn PDF document text
    • http://fecoil.com/userfiles/file/70178796073.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/917164e074f0b21962dab9836a32ded2/danupu.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/ii4fbuhj3rti71gmnaii5gd86o/67193781617.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/3024934528.pdfIn PDF document text
    • http://www.gabrielamaciel.net/images/content/file/junupejegubika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=po+request+formPDF 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_off0000e4d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 17352 bytes
SHA-256: be6c3d8c2ef633325812e1df99a9b53fea2cc101f4d1d600e97c7ae20c5e498e
font_02_sfnt_off00012aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABA 10220 bytes
SHA-256: 21c128a04d69566a48b7220016fed2a5a435d118e11511363b8e256643a075a2

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