PDF malware analysis — malicious · 80f45c940be05e3d

MALICIOUS

PDF

93.9 KB Created: 2021-07-04 13:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 98293d920d0a6b9bc049674bf13fc585 SHA-1: 7c55808ded069bd9258797b376d698627875c840 SHA-256: 80f45c940be05e3d4d0ef5bf2d5b0e2c428346b6405b226af24c18deec0dcd08

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports this, indicating a pattern of using PDFs to redirect users to potentially harmful external sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

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://muguet.fr/sites/default/files/file/rojosew.pdf In PDF document text
- http://rollfactorytogo.com/uploads/files/37117965512.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086d185f1af8---26550524626.pdfIn PDF document text
- http://gursakaryahukuk.com/images/file/65837423672.pdfIn PDF document text
- http://diclenakliyat.com/userfiles/file/guwudide.pdfIn PDF document text
- https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d09b86406f---29233483711.pdfIn PDF document text
- http://mt-filtration.com/uploaded/file/41138520360d68d64b92c3.pdfIn PDF document text
- https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca68d03c39---19132600611.pdfIn PDF document text
- http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a762bae1e49---mevaruvemamabeseteji.pdfIn PDF document text
- http://allprintusa.com/admin/images/file/75156027795.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ed2d0e6b4---9443568803.pdfIn PDF document text
- http://aunay-sous-auneau.fr/ckfinder/userfiles/files/gerida.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/06690b45f3e315a41f9e7f014d13aaba/senizitekigujigerozafuso.pdfIn PDF document text
- https://lasanisports.com/files/zuxiweg.pdfIn PDF document text
- http://morgancountyoh.com/userimages/fapotamij.pdfIn PDF document text
- https://almondzwealth.com/administrator/imagetemp/file/mexiradabuxa.pdfIn PDF document text
- http://universalestetic.com/userfiles/file/vutojopokemijire.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/9946u2oqcle93af8r0tsu1gnl2/54830386436.pdfIn PDF document text
- https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/00dee72e4275c96674a24a197d009a9c/9967939958.pdfIn PDF document text
- http://yaqeen-eg.com/userfiles/file/kemelazuwapudarafu.pdfIn PDF document text
- http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0dae67b939---4299424200.pdfIn PDF document text
- https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/s65ccpgv1iua7qac99gf9e76dt/27685756872.pdfIn PDF document text
- https://anhhuynoithat.com/asset/files/febexarivupagi.pdfIn PDF document text
- https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609117b5d3dcc---perugibibutokawi.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/52f75b730f885ba2b0d52d2b1a577107/51221279937.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=fractions+and+decimals+on+a+number+line+worksheetsPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f260.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF260	11032 bytes
SHA-256: `cdd4585b1691a878de08e2327361170b087d49adbdcf67d735ace559d3ec6350`
`font_01_sfnt_off00010be3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BE3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000123f5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123F5	17840 bytes
SHA-256: `34efd28c43f047563f5a6274cf09618dc1947ab9a619a711e4d103fec1a403d6`
`font_03_sfnt_off0001533a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1533A	16316 bytes
SHA-256: `50a81be9652d965b2bdd26a8cb0cef6732dae7a528794ab8cc6b574b3adf4c8f`

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