PDF malware analysis — malicious · 425e65b964a79b38

MALICIOUS

PDF

100.3 KB Created: 2021-07-16 05:13:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15

MD5: 9f84ae6a66f144f29275c9c99da4f309 SHA-1: b51b81cb340d62c6f9a10551e661f2253d1ab88b SHA-256: 425e65b964a79b38c1583b914ac34eef71a311e076d57cb0b5932b1b177bfd39

196 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9885

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://inwebjor.ru/uplcv?utm_term=addition+and+subtraction+word+problems+year+4 PDF link annotation
- http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a912783829a---79847890190.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/fcdeadb159b5369fac2952ed9636a543/95786785360.pdfIn PDF document text
- https://essaidafm.com/uploads/FCK_files/file/wotedixomone.pdfIn PDF document text
- http://thegroverestaurantnj.com/userfiles/files/61270589333.pdfIn PDF document text
- https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8af6dvtcqlga144754pon2vd7u/diwufilufavazisipa.pdfIn PDF document text
- https://jodhpurtravels.com/nbloom/fckuploads/file/pogudale.pdfIn PDF document text
- https://goodluckfishing.com/ckfinder/userfiles/files/85412199078.pdfIn PDF document text
- http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608825943dbb5---4193754702.pdfIn PDF document text
- http://www.urbanwaterways.info/files/2839894516.pdfIn PDF document text
- http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083788fd55b4---25487221247.pdfIn PDF document text
- https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/0841d1277458de6ff89453d029fb8228/somasegakojonamoxabiw.pdfIn PDF document text
- http://developmentassociationofnagaland.org/nbloom/fckuploads/file/xolebikavufaruxebulo.pdfIn PDF document text
- https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160763020ee509---gudotabosugibosuravon.pdfIn PDF document text
- http://bigxra.com/uploadfile/file/2021061615080973499.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1c0f1085c---ritosunemulopazu.pdfIn PDF document text
- https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/74898bab79137cdaabe75aad7254b3c1/xebulitupigokofakasud.pdfIn PDF document text
- https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/c3ea5b4605a502ef33a1cc3cdb2d92e0/vuwizupovulolipogisuvuw.pdfIn PDF document text
- https://projetounificado.com/uploads/files/90694384755.pdfIn PDF document text
- http://crocepadrekolbe.it/userfiles/files/1323830971.pdfIn PDF document text
- https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/09a1a1ddf4061b6aab927c116c057787/muxilu.pdfIn PDF document text
- http://smith-williamssisters.com/clients/d/dd/dd6cbc7353a6ef31c13ccaa63ab862ac/File/46764398870.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/3771297bd046bce858d7b04acb7a6693/47246919817.pdfIn PDF document text
- http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ptng0ohh1pedoknubtmdlep70s/jajunibijir.pdfIn PDF document text
- https://berbagiangka.com/contents//files/47893352788.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/a2e2a22963e74dfe67b00e849ffe208a/619906881.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
`font_00_sfnt_off00010203.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10203	11172 bytes
SHA-256: `41f67072f7e6c362bb9a9ff504626220d3c31a5a7f6f1331ad921de176aaabbb`
`font_01_sfnt_off00011c14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C14	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13422	10736 bytes
SHA-256: `64e5b3bfe1b30592fa494e1ad8efbfae18a962a20ff08efba72de725ea2b30fb`
`font_03_sfnt_off00015552.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15552	17324 bytes
SHA-256: `71fc2f14589b7afb64c3864fa78ca6735f0c2ac79fa52a6a0914040487fefa48`

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