PDF malware analysis — malicious · 0431cc6cbb86ff5c

MALICIOUS

PDF

92.1 KB Created: 2021-06-28 00:36:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 6f1bc0eebbc4f40c57229bad9a783a74 SHA-1: a106140b102aaadaaeef371acacd8070d8bd9c4b SHA-256: 0431cc6cbb86ff5cdea4fe9b175028fbe731ecaeae3388d33b9930bfeef3510e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm pointing to compromised or disposable hosting. The embedded URLs, such as http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3dcbfbf4---povozof.pdf, are likely used to redirect users to phishing or malware distribution sites. No scripts were extracted, but the PDF structure and URL patterns strongly suggest a malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9927

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://gillsandgeckos.com/userfiles/file/nexobimogulopomezugera.pdf In PDF document text
- https://hotel-la-licorne.fr/userfiles/file/xiwodagek.pdfIn PDF document text
- http://zpb-maciejewski.pl/upload/fck/file/xolezomikemunezilezobu.pdfIn PDF document text
- https://baongochoa.com/upload/file/99231227713.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/1d30a503d14815e7d48399b076229d7a/2901676145.pdfIn PDF document text
- https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/hu7isv5manbie6i40qc39o79gk/3449528557.pdfIn PDF document text
- http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e3dcbfbf4---povozof.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1607b693fb43c5---2625678077.pdfIn PDF document text
- http://kiszelyugyvediiroda.hu/docs/file/75816182609.pdfIn PDF document text
- http://aven.su/userfiles/file/domug.pdfIn PDF document text
- http://prinsart.ro/uploads/files/fekuwer.pdfIn PDF document text
- https://goooinggroup.com/userfiles/files/20210617_190905.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b503dfe7997---nuzulap.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bc7d9cf0e0401da42ac448db8bc2b7c6/bakuseg.pdfIn PDF document text
- https://study4student.com/cache/fck_files/file/damimef.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/840377b55ff14cadf2c2d7a49ef83c68/jakaxufuzixuzuf.pdfIn PDF document text
- https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/db2bfe1841b0914ab4481a02a707eda0/21434698907.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/6f8fb0a018b724abfe8b50b2bb34fc32/60993239535.pdfIn PDF document text
- https://avigailpekelman.com/sites/default/files/file/vuberat.pdfIn PDF document text
- https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/mtpiklrgp003qr2psneumq4hgb/wejofifozexeveb.pdfIn PDF document text
- https://activepymes.com/pub/file/89872519298.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/fc550a6lemlmpo8c07foj49i0h/27011974757.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/aqr6ogqudka1k1hgp0v2q547np/tilakaripogir.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=thanksgiving+message+to+professorPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f24f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF24F	10880 bytes
SHA-256: `18e46d5b9176729d4035042f22e6b96fb6e47bf4c32e88fe6de084af9af378cb`
`font_01_sfnt_off00010b4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B4D	16344 bytes
SHA-256: `5cd8a120e106fc2d4fc1855603a636a3ce922decfb1b4d98f17a4a5450337c58`
`font_02_sfnt_off00012146.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12146	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00013958.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13958	16040 bytes
SHA-256: `8e6e9f9862d33667563fd907996d300e97803e99aa4a1cdb944376698e6e1956`

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