PDF malware analysis — malicious · df307ca946d12f4b

MALICIOUS

PDF

84.3 KB Created: 2021-06-26 03:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 05085d0a9d220580b7019d9da8d3988f SHA-1: 2f6845cf506d413506d7f66cfee3a5f0917a7d82 SHA-256: df307ca946d12f4bdfbe382b7ba683e10f4e899c7aa176916155a3b5bc628b07

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The heuristics indicate the file functions as a link farm, directing users to compromised WordPress upload storage and disposable hosting sites. These links likely lead to further malicious content or phishing attempts.

Machine Learning

Nyx PDF Classifier malicious score 0.9860

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://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/2c02700c914082b39ff79d196ec9f162/47309728769.pdf In PDF document text
- https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/20e9ce5436dde2381d479cc0fd4cef04/70652876941.pdfIn PDF document text
- https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/e992081450d75a9c59e5986a36081e9f/88997231800.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/6c4ea7d7ac51345b8f07570ed91fefc1/63319648880.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfad473768---rugepotesewowip.pdfIn PDF document text
- http://www.cafeinca.com/img/public/contenido/file/fibibugogomokelalibeki.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/file/tasetibe.pdfIn PDF document text
- https://portugaliaimagyarok.com/ckfinder/userfiles/files/siradobebinuvutate.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/e8a6e15e6808b9f62dd372949a6a0364/pemipotaxixoz.pdfIn PDF document text
- http://southport1969.com/clients/861680/File/80703831845.pdfIn PDF document text
- https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160764d1626840---jujuwadupatitun.pdfIn PDF document text
- https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/3572a16b56ca53ca98824d8a652fb820/fomaponedunapowiku.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff412556cf---66553519285.pdfIn PDF document text
- https://szaktel.hu/uploads/file/6094028388.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d3a84f7a964585c0c28aafa72af966aa/16920538352.pdfIn PDF document text
- http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788d97b28e2---47568594495.pdfIn PDF document text
- http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7fe25f5db---41993284876.pdfIn PDF document text
- https://pezenasenchantee.fr/userfiles/file/5083640800.pdfIn PDF document text
- https://askisan.com/upload/ckfinder/files/xivasegowusagasetugesaso.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788704d8745---dinedeti.pdfIn PDF document text
- http://bona-agra.pl/Upload/file/84090877414.pdfIn PDF document text
- https://contactfm.be/userfiles/files/godojubuniw.pdfIn PDF document text
- http://train-in-japan.com/images/blog//file/43339555155.pdfIn PDF document text
- https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0db606dd1---wipiwimu.pdfIn PDF document text
- http://solac.nl/app/webroot/files/userfiles/files/70685237504.pdfIn PDF document text
- http://findmealocalpainter.com/insurazon/admin/userfiles/file/56714240242.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=chromedriver+exe+file+downloadPDF 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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000100c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100C7	10636 bytes
SHA-256: `9e7b0c8b53c627b2c2d161aea893cf2b0dd146437dfd2948fabb6270a5921584`
`font_02_sfnt_off000118f7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x118F7	16468 bytes
SHA-256: `d559aaaf5e4a6b12bce377b25d79a45325ca213622df5acf8a6ab459b9bf7c1d`

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