PDF malware analysis — malicious · fbed629934c83171

MALICIOUS

PDF

87.7 KB Created: 2021-08-11 20:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 29b5b9bee7090db75c6bf78613676afc SHA-1: 9b9cd1a951700d6a5159ea83ec279c6ed4db028d SHA-256: fbed629934c8317129209c2ee88884d85a93906a88195473b078094f0b4e0509

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ec9d1b9bc75---samug.pdf In PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f501c6b07---sosusunonavivuwimarep.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad5bc000ba7---ririjilulox.pdfIn PDF document text
- http://gocreate.termall.pl/upload/fck/file/roweri.pdfIn PDF document text
- https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a75fd63c015---47316031837.pdfIn PDF document text
- http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6471d2df80---57738061280.pdfIn PDF document text
- https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/ce0055881cdff1cea3602596bab8a9d8/jidasowuguva.pdfIn PDF document text
- http://jameshamiltondds.com/clients/6/6c/6cc67b5d90347a591bf4e9c0b97a5143/File/pugebufipetutetozumago.pdfIn PDF document text
- https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5b7b47f0b---2021308059.pdfIn PDF document text
- https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/bd93b3e0c49cb6641c5c94e066776d8c/fativom.pdfIn PDF document text
- http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/4ef1b5016c4f1847cfa388f79b4da210/22800844744.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/c7aabdccbf9c00851186f4216cc2b3d0/65760855340.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12e886086---44108371222.pdfIn PDF document text
- https://koncnc.com/genelresimler/file/renixalarinevimamovedetab.pdfIn PDF document text
- http://prestinoequitacion.com/imagenes/upload/files/lokapixukoxibemix.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b22ba12372b---duliririgojubexozimo.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd1a83aa6f---44945559251.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/41ef0ea311f15c533800be4f314be89b/24014786077.pdfIn PDF document text
- http://lapenya.cat/imgjovesnaves/file/rofimokiwi.pdfIn PDF document text
- https://vijyaiprismcrm.com/userfiles/files/susuwuwizav.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c76717e135---junofad.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/phg0f7gr8trq2h9o6pp36a9v84/fezubilafugesifaxuvik.pdfIn PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/v6fcsp82rikl656vqbtlfl6m44/vimakunerevoxez.pdfIn PDF document text
- https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/0d7e70632db956f1886de67ff73e97ed/2151798815.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fa6d9dc9f---5030927919.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b742bd1b4f3---fulowewilunus.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=application+letter+sample+word+documentPDF 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_off0000f35d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF35D	10844 bytes
SHA-256: `341f24952a24e5346f025491824f0a1b61e327891e495843fa9c4aa3bb583f3b`
`font_01_sfnt_off00010c83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C83	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012495.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12495	16656 bytes
SHA-256: `3e0c9d8ca57f7653c71556ff44e2705a39a075a0fe502d49ad5b54c036d94bcd`

Open this report in the interactive analyzer, or submit your own file for analysis.