PDF malware analysis — malicious · a807725ed14d42d7

MALICIOUS

PDF

86.4 KB Created: 2021-07-06 21:47:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: ade242036d4663a03234b502859c3a09 SHA-1: 3d4b1b40d7122906993d11925e38de537e7c1b02 SHA-256: a807725ed14d42d79dc2bf6a500c85583d831f2dc25e1c9139bf3652ee01ff5c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous links, many pointing to compromised WordPress sites utilizing the formcraft plugin for file uploads. This structure strongly suggests a link farm designed to redirect users to malicious content, likely phishing pages or malware downloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9922

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://philabc.ru/uplcv?utm_term=class+10+chapter+10+theorem+10.1 PDF link annotation
- https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ec63dc8d7---57031090534.pdfIn PDF document text
- https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfbb727d33b---katavugidu.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c890365860---wifosaj.pdfIn PDF document text
- http://www.tokyomagic.jp/images/library/File/garilodor.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094091dc37d4---76980580982.pdfIn PDF document text
- http://bevelec.com/bevelec/dossierMois/file/1482653416.pdfIn PDF document text
- http://zhengfutz.com/v15/Upload/file/20215262253274329.pdfIn PDF document text
- https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607830084d57d---rasatopato.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078098de97c6---nomafupagomefanigetodipu.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2ba055355547e292e2e9d59b9af344ac/62052683858.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0c6880885---31000697716.pdfIn PDF document text
- http://100gastro.cz/soubory/files/75282267983.pdfIn PDF document text
- https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607addb0d8306---vubasezomodeperanat.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16088bbf29ebbd---65116720487.pdfIn PDF document text
- https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/6e7ca283b94dd15309addebe0079db60/pikabupejakudusu.pdfIn PDF document text
- http://alarcon-v.com/editor_upload_image/file/11558005350.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/cf5610c14bf0d26f32dcc5e9a2680b9b/39241847773.pdfIn PDF document text
- http://nena-artspace.com/ckfinder/userfiles/files/patukomubov.pdfIn PDF document text
- http://chikatere.com/Upload/files/92690454009.pdfIn PDF document text
- http://dgjst.com/upfile/file/3556415341.pdfIn PDF document text
- https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/cfc981bf98186908d9481fc9bafe3f7a/68595163099.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb7043d883---65063092549.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/26662d628e7af2a3cfa7d04fa8eba554/86732092779.pdfIn PDF document text
- http://symbioticlifetech.org/attfile/fckimg/file///20210705131142_338892230.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f65895336---bivamoserowefafateroto.pdfIn PDF document text
- 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
`stream_002_off0000d360.bin`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xD360	18680 bytes
SHA-256: `b405de0b823736311fb0e112db9b2d0d70b5d659d8ea00a92c40503969272e2d`
`font_01_sfnt_off000104e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104E9	10712 bytes
SHA-256: `776d66401dbde438c1e2fe5eaa58d80e2efa0aa87f1e10b7e91a19b13ed97f0d`
`font_02_sfnt_off00011da4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DA4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off000135b5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135B5	16224 bytes
SHA-256: `7d021a1735e72e2d4fd16d1750f0e82041cf66baca08667ccfe38d67c512953f`

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