PDF malware analysis — malicious · 5497a84bcc30e8fe

MALICIOUS

PDF

86.8 KB Created: 2021-07-12 16:13:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 246c00d9c3386717f7359c2518133eb6 SHA-1: a70da34932d98995b4d9f376268a1f0a2a2ceeab SHA-256: 5497a84bcc30e8fee514d072ece8d587f6dc979f720e39a16f9387d69b98807d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites, likely intended to redirect users to malicious content or phishing pages. The file's structure and embedded URLs suggest it is part of a phishing campaign, potentially using embedded JavaScript to facilitate redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://oniceh.ru/uplcv?utm_term=what+are+your+strengths+and+weaknesses+answer+for+freshers PDF link annotation
- https://watfordfairtrade.org/app/webroot/img/files/18663126435.pdfIn PDF document text
- http://stalmost.pl/userfiles/file/79384468351.pdfIn PDF document text
- http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16088ec92186d0---mewegojajekatuloruzu.pdfIn PDF document text
- https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/6e55f9258fa5c264a64217ed200de485/gabunawudesafoguxomikixa.pdfIn PDF document text
- https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/2d4tsehtfgci79nubt23srbh87/69840191828.pdfIn PDF document text
- http://richardsonfamilyreunion.net/clients/7/79/79e100fddb184f5a3447a495e7c481fb/File/varebesamubatixa.pdfIn PDF document text
- https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/0b883ff38f2c813d46ba73aa8e0c53a6/90336187433.pdfIn PDF document text
- https://cuisinescartier.ca/upload/editor/file/32344244529.pdfIn PDF document text
- http://av-jet.ru/userfiles/file/10131762706.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d07dd403f7367c885085da9c7527a8f3/22244956317.pdfIn PDF document text
- https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/6435790a7d5c41352d27985028c83821/tibebubinekuzatur.pdfIn PDF document text
- http://ithaca1961.com/clients/875375/File/82983923202.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3fde2f68b---24719805710.pdfIn PDF document text
- http://nextgt.eu/uploads/file/nosobexupeleja.pdfIn PDF document text
- http://scuderieverdina.it/scuderia/userfiles/file/59882968386.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160928ccf13ca3---dawam.pdfIn PDF document text
- http://sbhs1967.com/clients/8/89/8985ce50e7417da620f75e2af787291b/File/24386274139.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/e62c218cd6c9dfcb4c3cca358d0c9f90/28445198807.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/q7epauvnt7tep18rpp8nqk75eq/15668591810.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/fd8b409ebe001be6edaa1ff3723c5132/sodakarezokomela.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608443b3a1f5f---godasovovujolusuxuja.pdfIn PDF document text
- http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf522604a6---notitenegabujubixofawom.pdfIn PDF document text
- http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7811aa3ea7---42519559871.pdfIn PDF document text
- https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608db27515c49---18289936008.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2696cadcf---kamirozogebugikubosu.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000ee98.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE98	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000106aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106AA	17536 bytes
SHA-256: `7c096ccbae6b378e1a6c1d9906eee0e99c27b90dd641de73fa85a5b6b5e12083`
`font_02_sfnt_off00013475.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13475	10880 bytes
SHA-256: `765f4a72227245d4abb5a5ff166e855f5fedcbe6d477adfbfb45b4f9f84dd936`

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