PDF malware analysis — malicious · 94123cd9e3c913de

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 11:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12

MD5: c7e3128a2173d15c44b4027852212cf9 SHA-1: ca7832e3575b397b6aa0e1d6356bc5b95e5dc8ee SHA-256: 94123cd9e3c913de9f269352f58fd9510dd48dc996e69ce4217b3619b4b098f8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. Heuristics reveal it functions as a link farm, pointing to compromised WordPress uploads and other disposable hosting. The embedded URLs are designed to redirect users, likely to a malicious site for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

Heuristics 6

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 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://juhaszautovill.hu/userfiles/file/85469996162.pdf In PDF document text
- https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gvevbqoop188emj57fsuaqmkm6/poxowoz.pdfIn PDF document text
- http://designklasse.de/ckfinder/userfiles/files/96684069006.pdfIn PDF document text
- https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8f0527b846---3086283893.pdfIn PDF document text
- https://adasms.fr/userfiles/file/51765884398.pdfIn PDF document text
- https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/fqt0c3pjbd1o4mqh0qqi6du7a3/fusivoxi.pdfIn PDF document text
- https://almudenafernandez.co/ckfinder/userfiles/Files/80512204469.pdfIn PDF document text
- http://www.uc-kushiro.net/images/library/File/xosuwa.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/96e6f26fa5238913b36f49bd4fdf4822/zifojuzigepuwajafubu.pdfIn PDF document text
- http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eeec9e4ece---42466592089.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/68ed4c85ccfd7ff377fbff8ab1bc2291/nemipivifilupujatesazepat.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/27819980305.pdfIn PDF document text
- http://aarogyamedico.com/userfiles/file/menizejavotusavas.pdfIn PDF document text
- http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aabf74a6d25---16740222368.pdfIn PDF document text
- http://lubrifianti-auto.ro/files/file/lamigifuz.pdfIn PDF document text
- http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16110dc9131e7c---7828875067.pdfIn PDF document text
- http://dodogs.ru/sites/default/files/file/56931342154.pdfIn PDF document text
- https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097775ccdf0f---malomijugowapiremiwomilex.pdfIn PDF document text
- https://aravlicraft.com/cmsCart//upload/file/8589762567.pdfIn PDF document text
- http://vietxetai.com/wp-content/plugins/super-forms/uploads/php/files/q92jbdn71mis2k8ocmkss83sc4/47354005769.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/976b0ecbe2220b369827ade5283dae5a/56636365704.pdfIn PDF document text
- https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/10f7cf87741b870899234d07b478793c/18420316384.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef5ef1d9f---84122481297.pdfIn PDF document text
- https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/36912611f332eea77012139de4ff50e7/rifufej.pdfIn PDF document text
- https://matrainagycsalados.hu/userfiles/file/1836711025.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f674be83d4---51442415413.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=measuring+worms+worksheetPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e3a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3A3	10780 bytes
SHA-256: `5123a97ac4131a3f8b0860ca769f8a8987d4fac31f98eb1c820fbfd56fd73630`
`font_01_sfnt_off0000fc5c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC5C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001146e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1146E	16716 bytes
SHA-256: `346a9beb48e590a0f0beb0f7e6dd00bfefd1a955c911689698e143a143e16864`

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