PDF malware analysis — malicious · a82983379b8390c5

MALICIOUS

PDF

87.5 KB Created: 2021-07-10 05:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 4a6ffca3d9b3393d12b82dc33b6f87b3 SHA-1: 3d41a309b2fa131bbb81a39efa63447160915d87 SHA-256: a82983379b8390c5209957482744d7bb267fe4dbacb281d01c91a9b5e0fb0c2a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting a phishing or scam campaign. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://catamma.ru/uplcv?utm_term=girl+put+your+records+on+tell+me+your+favorite+song+lyrics PDF link annotation
- https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/4419a983f7fce9842735902ff6ea5b00/saxabagowogupebejurelil.pdfIn PDF document text
- https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24bc54539---73637366142.pdfIn PDF document text
- http://remaining-mc.de/userfiles/file/65215209831.pdfIn PDF document text
- https://guruamardaspublicschool.com/userfiles/files/33869634801.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de55d631cfd---64727469047.pdfIn PDF document text
- https://evrenmentese.com/upload/ckfinder/files/10538581445.pdfIn PDF document text
- http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf26b46fd8---xazovokusesomenigaxorixe.pdfIn PDF document text
- https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/768e6700faaebd06b45b199dd0804500/4899134924.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/cd13633e3fb50a5f973d9ea7111b7a6a/82827987025.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16079e1853cabe---vulapigodinaro.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc186effb---62481373664.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ae9771098---12383432719.pdfIn PDF document text
- http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608006c0e79a9---xosinavezawefedelemobev.pdfIn PDF document text
- https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/h0hpmuogj6be3792d6t78f2ia2/34302525034.pdfIn PDF document text
- https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608038ca56b23---kusagelexuto.pdfIn PDF document text
- http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8b1a35b16---namedunomukuxi.pdfIn PDF document text
- http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e140decac2---82642857662.pdfIn PDF document text
- http://www.gc-antey.ru/ckfinder/userfiles/files/wiwisefefanoketufom.pdfIn PDF document text
- https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/bdbe1cfe915ebb37c42b0934b461991d/tivojosisi.pdfIn PDF document text
- http://954move.com/clients/4890/File/60672886933.pdfIn PDF document text
- http://fusheng-vietnam.vn/admin/webroot/upload/image/files/gonofomuzulabuxobujogiv.pdfIn PDF document text
- http://thunderstar.cn/userfiles/file/20210606173221897579113.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082578d29c44---83938407868.pdfIn PDF document text
- http://gemwishrs.com/ckfinder/stones/files/lusolajiwogofekitikim.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160aeaca8d43dd---96676183883.pdfIn PDF document text
- http://70sromans.com/clients/871711/File/pigowamupu.pdfIn PDF document text
- https://palezieux.com/ckfinder/userfiles/files/46606335552.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_off0000f06c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF06C	11280 bytes
SHA-256: `be101f20f42f8fb02fd8e2f9bc495597e91a272426efbbb79439183d2f3ea679`
`font_01_sfnt_off00010abb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10ABB	17188 bytes
SHA-256: `de9778fed2cce3d7a2314dc0719e0b568013a3ca499b905f0cf188c1e51fdb5b`
`font_02_sfnt_off000137cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x137CD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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