PDF malware analysis — malicious · 0440e0d45bbad4a0

MALICIOUS

PDF

89.7 KB Created: 2021-07-01 12:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: a3a5ca88b8149235b998f60d2cb1d83c SHA-1: 301b2a0c21c5b63bb096bb2491886cf0e44f7a4c SHA-256: 0440e0d45bbad4a018860fd6dc4f891204c436cf3c2ce0a8bf8f2a3304e412cf

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to compromised WordPress sites, suggesting a phishing or malware distribution lure. The presence of multiple distinct hosts and the use of 'utm_term' parameters indicate an attempt to direct users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://smidgel.ru/uplcv?utm_term=apex+requirements+pc PDF link annotation
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d244a5ac7dc---xosuzefon.pdfIn PDF document text
- https://planet-for-events.de/userfiles/file/88141205361.pdfIn PDF document text
- https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/9sj1jcu88fkotqpij3piajke20/61231946712.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e138e72953---sebedudesovejesupoxabopur.pdfIn PDF document text
- http://annassteen.com/ckfinder/userfiles/files/63834004433.pdfIn PDF document text
- http://vizcsap.hu/files/file/93617564799.pdfIn PDF document text
- https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/tvov72uv3jgkvuj7qh52o8tdn3/8062718506.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b70d93aeb6a---82102099297.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160878bd19c7de---22572784853.pdfIn PDF document text
- http://simonhoirup.dk/userfiles/file/17006574994.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ae21b56eb---pijajozixevopevavaxa.pdfIn PDF document text
- http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ac477e424---pujuvoliwupuvupumulo.pdfIn PDF document text
- https://my-natural-style.net/upload/files/59472764922.pdfIn PDF document text
- https://rajatotogroup3.com/contents//files/purowuvipudasi.pdfIn PDF document text
- http://best-infosystems.com/userfiles/file/69661251402.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810141478c6---44645645996.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/sonoridupijusuzebigowir.pdfIn PDF document text
- https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/9f61bb735e067b511f4e99b2120d4f99/15994070926.pdfIn PDF document text
- http://pr-jam.com/ckfinder/userfiles/files/75285649484.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/9ed7d118472e05a6400e555691ff8ebd/56083775140.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d1541d9f3---43048883585.pdfIn PDF document text
- http://aven.su/userfiles/file/24813811565.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a92abc6e28e---40075533238.pdfIn PDF document text
- http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/nupesabaxopezowumupux.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160733bb8d9ee0---5286151545.pdfIn PDF document text
- https://empirepin.com/calisma2/files/uploads/sazogasexebeke.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_off0000fba8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFBA8	17156 bytes
SHA-256: `92c6ac38aa82735795ba1b9135f769cb305f704bccd5e928a34fe3029dc33b41`
`font_01_sfnt_off000127fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x127FA	10536 bytes
SHA-256: `c7ab6fd794ac39b27ac426875eb2b49979852795dc1c0319c271ee3600ce4f30`
`font_02_sfnt_off00014005.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14005	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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