PDF malware analysis — malicious · 6ff23368ea1319da

MALICIOUS

PDF

92.1 KB Created: 2021-07-02 16:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 1465dd4277e72730abb3562d037e2300 SHA-1: 179af9c313cb75a7d6f844e76488662272d1a8be SHA-256: 6ff23368ea1319da06fc37b1f8cb2ca57ddae466225505159273b68f91a2820d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The ClamAV detection further confirms its malicious nature, identifying it as a phishing trojan.

Machine Learning

Nyx PDF Classifier malicious score 0.9820

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 http://merwepizza.com/upload/file/renijuku.pdf In PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/78k4po1o7ffobmmnj7t6c5tqc5/beziwij.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e45133c82f---vijivamuk.pdfIn PDF document text
- https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0b7f27e49---66090931148.pdfIn PDF document text
- https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/37bce2d1a36f3a747624ba86fa34f47b/89834890511.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/24e2b8937f92ebde2e6ffdfc9698b7d0/36248770546.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608874c51398c---85077420031.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cc54557e073---91283930410.pdfIn PDF document text
- http://stepsforstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/gujiboxuwutufin.pdfIn PDF document text
- http://irk-yoga.ru/upload/files/kodezaro.pdfIn PDF document text
- https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a114b770736---zufebowavomifud.pdfIn PDF document text
- http://vetcasatenovo.it/userfiles/files/nujajuk.pdfIn PDF document text
- http://jrmhandling.nl/upload/file/tarumogodojir.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608172399fee8---58179860856.pdfIn PDF document text
- https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/3f30d4d3ecdcb7023dc486a9e1778ebb/mebupar.pdfIn PDF document text
- http://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/fuxipetilowowamisivefam.pdfIn PDF document text
- https://mama-light.net/business_school/uploads/file/goxisudixuwavofijufamexum.pdfIn PDF document text
- https://langestrand.se/anvandarbilder/204/files/zukidomevegow.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7d153432cd73d0337fa53b33e303f4e5/risogexev.pdfIn PDF document text
- https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a07b853986---6006786874.pdfIn PDF document text
- https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0a4bacabc5a814497280bb27a239252b/31014726549.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c95c5409739---24211593404.pdfIn PDF document text
- https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/8nenfg4hg20ll2m493t0k3d5np/10476666957.pdfIn PDF document text
- https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/140b703e12b99835dff8bd5519dfc4e5/rupugenewalumozaxesakujuz.pdfIn PDF document text
- http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a404571ce---jidajuruketilapodelovila.pdfIn PDF document text
- https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/k81l1626di6rdos8tfp2bevr66/xipiwedabusud.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=spac+ipo+2020PDF 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_off00010662.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10662	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011e74.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E74	17588 bytes
SHA-256: `8cfdb75057519efdfd2c796d88610b8fcbec68f19e8a4b3d8e2a02c894f9eb63`
`font_02_sfnt_off00014c8c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C8C	10036 bytes
SHA-256: `8c0c640b4f1fe72102cd4f00bc867bd08b5a0539df1021e181db3add59bc91d1`

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