PDF malware analysis — malicious · bfccdca0bc007a5d

MALICIOUS

PDF

81.8 KB Created: 2021-09-02 21:29:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 737b8043e15f82631ceaa6eeea55cb1e SHA-1: fc2044c46dddac00f93ff385d28eec84d58cf831 SHA-256: bfccdca0bc007a5d61a130614e34bd883edf0b425400f5eee7a479dd6007dd26

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document contains a large number of links pointing to compromised websites, many of which are hosted on disposable domains or use common CMS vulnerabilities. The heuristic firings indicate it functions as a link farm, likely intended to redirect users to phishing sites or download further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://garglob.ru/uplcv?utm_term=vccv+worksheets+free PDF link annotation
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb665fb9726---jisuxutasupajexogunewa.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/tu81q4gu8ptq5mja82tmkhm3b2/61503435566.pdfIn PDF document text
- https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/749e41a8b462d5acb5a70c449ce17c07/56642708289.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe000ae304---sizujibevudagopux.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/wiwujo.pdfIn PDF document text
- http://dynamic1984.com/user_file/file/dawexik.pdfIn PDF document text
- http://mdbim.pl/ubezpiecz/obrazy/file/22239828393.pdfIn PDF document text
- https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/844482dc9254c2f4a1f09ce16a1d498b/35865720228.pdfIn PDF document text
- https://morganmethod.com/ci/userfiles/files/xevivitopukadovup.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/31e2ca5eae5e805954d0fbe810f55776/zugoporipisizivijupo.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/fodebukamulimiwitiro.pdfIn PDF document text
- https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/049fd870890b18b77eaf7bcd21523164/mexiwawazolobivezufumazi.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0b44a93ba---pesapenoluz.pdfIn PDF document text
- https://www.alapan.org/fckimages/file/15322103305.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b7774bc781---purenusakimuxuder.pdfIn PDF document text
- http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/kmrf48shjahtqat9d4eiper154/59113765600.pdfIn PDF document text
- http://prospekt-rostov.ru/ckfinder/userfiles/files/rogugirumuwapojuda.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/8e6abf7c016bd381191c731addc9b240/nobunuvowiseligelos.pdfIn PDF document text
- http://qianxish.com/ckfind_image/files/39828294310.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e834007e9aa---69043270599.pdfIn PDF document text
- https://media-get.com/userfiles/files/lorusovo.pdfIn PDF document text
- http://dirpub.org/editor/ckfinder/userfiles/files/5302823338.pdfIn PDF document text
- https://www.vpn-solutions.com.pe/ckfinder/userfiles/files/setazesusoli.pdfIn PDF document text
- http://belgium-ex.com/images/blog//file/60971801372.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607f50852c4ef---91475285295.pdfIn PDF document text
- http://stlnsk.ru/uploads/file/28520939379.pdfIn PDF document text
- https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6d30d2d2---favifas.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_off0000da8f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA8F	10244 bytes
SHA-256: `a6fe35bb1177a075296ddc9cc5a4542f784083d1d29dc6f4cb5a1cfbb10ae917`
`font_01_sfnt_off0000f1d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1D4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000109e6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109E6	18452 bytes
SHA-256: `48cdde7896e55294d91e2c8ee5ab269bea3d17ae3acd81df8d72ff291abb54b0`

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