Malicious PDF — malware analysis report

Static analysis result for SHA-256 18faade00b64887c…

MALICIOUS

PDF

111.7 KB Created: 2021-07-16 07:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8d2e7c3e5d36c5f33a4709e6c51df92c SHA-1: 865aa80d195ebb3307c6354b1857efc5ccacaab0 SHA-256: 18faade00b64887cd7b8d4801f60150c4ba971c15ba2a23c4b5c9586499b1bf6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on compromised CMS uploads and disposable hosting, with numerous distinct hosts. While no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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 https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/mbpofjhe96ocpdcs1ca8dc6nak/vofepekelaliva.pdf In PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/0811969035c5a9e5cfa5f7aeb645274d/kurixutewesotifosu.pdfIn PDF document text
    • http://aryajob.com/user_upload/file/wesanerez.pdfIn PDF document text
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2348d0ba---sitepivudewozakopot.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a019822fa97---44646765124.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a38ef820b532fecdfc02c44de98ce50/zusuxuwaxuwubokoletamivu.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/7005362137.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/0f5e8f312b1af3bb02150ff460569887/pogoja.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/22024089814.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160790a26efb20---16806212446.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe2ec417b0---kejaje.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/kotimekipoxor.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f4eff246c---taweluzorelarek.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/40b50829136430ee6670e0efe79b9064/87906275064.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f608cc99---dagodedujenuxudezaxe.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f342dba07---rozit.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/849ae482ce57666d633af73ab4b15d1e/97384710229.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/kuwojuwe.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/rupoxirumiturugiwatinukax.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e009a988b22---57494775628.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815b096ccd8---65693102270.pdfIn PDF document text
    • https://brod-plovdiv.com/images/49695929806.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/tozobetubazivuwij.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862c17bef87---60414098828.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/pevejijuwurede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+complain+in+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000f5bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF5BD 20224 bytes
SHA-256: 4595b19041b3988f3f9a29d97f38e2e1f5f5567c06c49d057074ff929026671a
font_01_sfnt_off0001175c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1175C 33180 bytes
SHA-256: 77d6c5766f4936dcdfb79400c0387c0c4a56b9b2b89ea77b06fd6f18125b3a7d
font_02_sfnt_off000169a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000181ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181AD 6284 bytes
SHA-256: 4604dc8576506ba3851c7e3167049d22818554873fd3dda89bb798c4f988792f
font_04_sfnt_off000197e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197E3 10724 bytes
SHA-256: c386fc17c2c850c7b01f0f3ad314b843d099c50673559463bb55c1033e117549

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