PDF malware analysis — malicious · 7dd92bdd09e56fec

MALICIOUS

PDF

72.9 KB Created: 2021-09-04 20:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 673b0cdbb9e068d9247cbce0c2d94bc2 SHA-1: 27519e9a24fcd63f0a30b5e3ab9cd9ec1567a20f SHA-256: 7dd92bdd09e56fecc4cacc9874c6875e2ac3575b7939a6848290c3d20c9102c2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://cructi.ru/uplcv?utm_term=ihip+bluetooth+earbuds+user+manual PDF link annotation
- https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1a3da2773a---5633937602.pdfIn PDF document text
- http://csc0532.com/userfiles/file/20210801175415_wggg2u.pdfIn PDF document text
- https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/kopinenitux.pdfIn PDF document text
- http://bptramptour.pl/files/file/nulixezepugisojizifak.pdfIn PDF document text
- http://pendekaremas.com/contents//files/29314844632.pdfIn PDF document text
- https://ibeguiristain.com/userfiles/files/14318581993.pdfIn PDF document text
- http://dmhu.eu/uploads/uplib/file/xidomibalujupoworeme.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609e70ed63bcc---9502889062.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ekodcff5m0vm48mtf41dl1g01s/dalojuxidomijupexasovet.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de222e82fdb---69436647153.pdfIn PDF document text
- http://yournamebadges.com/withyourdog/cms_uploads/file/54509308580.pdfIn PDF document text
- http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/59k7c4iuebe1q168h6ncp2po56/vejorov.pdfIn PDF document text
- https://sportyou.fr/ckfinder/userfiles/files/rubakajorigoda.pdfIn PDF document text
- https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/8qr3s2pg1tfevj1mco5dca7toe/wijemamez.pdfIn PDF document text
- https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/aloafp49e0eqvcg3c0k0qbneq0/29343712669.pdfIn PDF document text
- http://seidels-mineralienwelt.de/images/uploaded/file/zodununevenokaminumipube.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0cd248589---dakizikufopidewi.pdfIn PDF document text
- https://ever-progress.com/upload/files/xanubaritigejomikijawaw.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/61eb050e67b9a76b190318164801e25f/97628715248.pdfIn PDF document text
- http://jkohut.pl/file/54770043459.pdfIn PDF document text
- https://www.rekalibracija.com/wp-content/plugins/super-forms/uploads/php/files/bb7e0445830b1c349b35fe65e1edca8c/96981488934.pdfIn PDF document text
- https://powermailer.in/userfiles/file/bakenotixilunefivikurafur.pdfIn PDF document text
- http://wib24-admin.de/uploads/file/13903860521.pdfIn PDF document text
- http://thegioixedap.net/upload/files/tosuzesikopejukalav.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_off0000bad8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBAD8	10848 bytes
SHA-256: `ab9109574663b2575c919da74841d11f7cc9c1345af9b05b9e739422f5e8c22c`
`font_01_sfnt_off0000d369.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD369	16696 bytes
SHA-256: `17eece2975372526f188c07d658e4c0da19b1760de296299e96e494ee6f27e86`
`font_02_sfnt_off0000fdce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDCE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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