Malicious PDF — malware analysis report

Static analysis result for SHA-256 90fdafab86b1b270…

MALICIOUS

PDF

86.8 KB Created: 2021-07-13 21:46:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 04af74b64d252835199d79909061e913 SHA-1: cfe22ef16fbad0ee5b90d95924acb259f83904f4 SHA-256: 90fdafab86b1b270ed1c35a6501af75787a2948c5bc0bc927d07c9347b1ad5e9
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, many of which host PDF files within WordPress plugin upload directories. The presence of a link farm on disposable hosting further suggests malicious intent, likely to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fed73b9b1c---21623123546.pdf In PDF document text
    • http://recrute.fr/files/files/76592283028.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/jeripomaromewatunotirefiz.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7f0f7ede4---xilixine.pdfIn PDF document text
    • https://mrmusicfoundation.org/wp-content/plugins/super-forms/uploads/php/files/vck0cvbvogojt365ch840rubr6/pusipeg.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/5ql7ei1j18aok6eu4mq7nrs5or/41976254378.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/23267293339.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/92138697735.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/40b4dc8d7303b89680c9138656e29885/7660625954.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/57422096758.pdfIn PDF document text
    • http://www.sname.org.tw/sname/ckfinder/userfiles/files/reparotigusufidukalope.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609102c719d13---baxufamezuxawota.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/55407317149.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/fobawagapevekoto.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/b37ee25f9ca729784aff403b50907f87/82098948605.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/ad3754ca825862a96cc85610609c49b0/71325625502.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c35870c051f599ce771c1455433613e0/zabowegerulolotapamok.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/nazinusujowufiruvimir.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/kedatefagupozalivunabem.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f936e4194---34826801485.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/3a2f22a84a09d0ed7766493e287b8d5f/vikapakuk.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160acebd7620ca---vimozojivugotujulidaw.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608456dac63bb---wifosagopuxewe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=pollywogs+and+tadpolesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAD 10576 bytes
SHA-256: 34cf2b74a6e58c27274b00e6b6ff11bbc153930d41e769d7d9b500b27acab275
font_01_sfnt_off000107da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DA 18120 bytes
SHA-256: 54e5679a206ddf66873ba12584fffe5685f5d51c7b95ec6cea9e79c06862de63
font_02_sfnt_off00013621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13621 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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