PDF malware analysis — malicious · 720e8878dad032e0

MALICIOUS

PDF

85.3 KB Created: 2021-08-02 06:49:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 34462e891e939dd480ba0f0cccb145f9 SHA-1: 8739627b901da131118ca6f74e463e4ad4835abf SHA-256: 720e8878dad032e0c75dd72850cbf619264d54ce0f61ad087e5f8af4bb39a896

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or a trojan. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9969

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=grand+theft+auto+san+andreas+hack+mod+apk+download PDF link annotation
- http://local-minicab.com/survey/userfiles/files/wukidiviwitam.pdfIn PDF document text
- https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/16103c4c1d2361---6032625915.pdfIn PDF document text
- http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5c746b2f5---81493428490.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/7b139c13eb33d509fb24c4a7eb23767c/3571693724.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/fac2b9068a8ac7feb332309329db298d/97857150687.pdfIn PDF document text
- https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/esnl0k9i991s6fqa48l5dj6117/lekalisawogasubewutivo.pdfIn PDF document text
- https://ekaplast.site/admin/ckfinder/userfiles/files/78232945480.pdfIn PDF document text
- http://agnieszkapawlik.com/userfiles/file/1438480581.pdfIn PDF document text
- https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8d12830213d5ffa3baf1d31b55ae86fe/90560780620.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087220126686---38801919061.pdfIn PDF document text
- https://ultralloy.net/upload/files/rexezomat.pdfIn PDF document text
- http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072ad93b5388---lutikoj.pdfIn PDF document text
- http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429214444798964.pdfIn PDF document text
- http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f2b2e8c97---tekufisegakozojulutaxu.pdfIn PDF document text
- https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/9qio63qqtdp9ol2j4m3off4r3k/25243132912.pdfIn PDF document text
- http://chinazzjx.com/d/files/puvuridepisumoneroma.pdfIn PDF document text
- https://oversaslogistica.it/file/gazoloxebavisazegiwuw.pdfIn PDF document text
- https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c92b81e1aff67f1007177ade7dd9af2b/fororo.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/i6h10pdq26a7b3mcirkik4vog3/58317660622.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af3d4ba1954---zokagokevokek.pdfIn PDF document text
- https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/vikaxowivafobefepexow.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee53acf819---wixogimarijakonamukeruz.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000dbbf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBBF	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f3d1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3D1	18400 bytes
SHA-256: `d148476aae5a147062b0a4cd93b305d872d8ac69eb12aadcdd7bd8912371034d`
`font_02_sfnt_off000121e0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x121E0	1992 bytes
SHA-256: `cfc0562b7f060e57d1d7fe2fccaf21dee208c06e8b524b1a6a7da1b303cbf50d`
`font_03_sfnt_off00012ae1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12AE1	11112 bytes
SHA-256: `ed75f2728525fef8b30c71d3d944300a84ca8158b01acd5b43c6adaa17a0dc9e`

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