Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc70a6cff6ea09d…

MALICIOUS

PDF

85.6 KB Created: 2021-07-23 07:10:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5798b26af2e36fe799ed20ff9f25d764 SHA-1: cce160f6bf06c345c717801f1a1f51a4e1528467 SHA-256: cdc70a6cff6ea09db2372bf7e4b1cda0c587efb3a2400be5dd3ae17563ce3dce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. ClamAV detected this file as Pdf.Phishing.Trojan, and the ML classifier also flagged it as malicious. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users through these compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdffb20873---benowowatalogura.pdf In PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160ad96394a500---nekufokajuwipizizogez.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/ireqo10f2ig799lqm9p1qr3jvg/lidumefuwilerepud.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/13386160039.pdfIn PDF document text
    • http://lmyc.net/clients/875386/File/rozufukepitisoporema.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/v0lr6fe8dfmpakf6aanf2s65i6/27524012661.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/sedativani.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/87037974550.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/nelot.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/c9ovofha90aapfifmg27m912o6/93063716238.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086415b545ca---kopul.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/zeruzekiremodu.pdfIn PDF document text
    • http://lucann.com/Upload/file/56046219293.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/4eubdj6aehoil32mi9kitlapn3/30821392101.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/zepilegened.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/26048054672.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a7033c313---kukiwotozoreg.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/lifaxidanasarobevivan.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9326540780---dulibexe.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098841d8e500---xewas.pdfIn PDF document text
    • http://maristaslardero.es/userfiles/file/zixalag.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160784981e290b---83499388732.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/adbe694a54f5a2992d7229517957aa89/gibamuzet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=troubleshooting+oracle+performance+pdf+downloadPDF 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_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 17112 bytes
SHA-256: 5d599aeb305a348f99be39cc8f4631649572c02bb8e23ebef12f876641e7fac5
font_01_sfnt_off000115e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E7 11356 bytes
SHA-256: 645cb5a0e8e70104f48029d04050d6f8294e851067018e5f9c3522785382704e
font_02_sfnt_off00013020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13020 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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