PDF malware analysis — malicious · c523c649968ad771

MALICIOUS

PDF

76.1 KB Created: 2021-07-17 16:12:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: a10a055c11894b9db0f50c58790c2e89 SHA-1: b478ea507596c9a6fbb5ca0e253caa233a0c5286 SHA-256: c523c649968ad7716419078c728cb3231a8ce4dd8b2883ee17170ff26a04b232

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by an ML classifier. It contains a link farm pointing to numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting an attempt to redirect users to potentially malicious content or for SEO manipulation. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9971

Heuristics 5

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 http://www.sport-konyv.hu/userfiles/file/75035068851.pdf In PDF document text
- http://www.aamuhsv-madisonalumni.org/files/files/12447450071.pdfIn PDF document text
- http://hongdanhaudio.com/luutru/files/42649217445.pdfIn PDF document text
- https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5afd0e5b96f038b0fbf2dce4fa45c15e/jipofolajuvag.pdfIn PDF document text
- https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/v852gb3vlscvgm1t4tprjmmjvh/vadamugo.pdfIn PDF document text
- https://marcuspietrek.de/MARCUS/files/file/ragatemuzonegiwered.pdfIn PDF document text
- http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b391bb02000---menofebotakaxujal.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160928e6cd8157---zobeloni.pdfIn PDF document text
- https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f244d37df98a6f13dca292fd05159846/77891651028.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/foqnfhtfdp6g7vq01ag2a6q38o/besefixuzeremofotebodugus.pdfIn PDF document text
- https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb1ce292e7---9916851471.pdfIn PDF document text
- http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080922f7932e---56413838613.pdfIn PDF document text
- https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/79f6db829370034fbc7952cc6d537447/5469522348.pdfIn PDF document text
- https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/80e65db08c5d6b5a30c4fa52c2502765/91055514913.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hpebm0mjgj4j2voc30ela0dpi5/50570553994.pdfIn PDF document text
- http://cheapmarkt.com/userfiles/file/67223490312.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed81de199---petiwokopiwep.pdfIn PDF document text
- http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606d2e5d0b612---4184765347.pdfIn PDF document text
- https://www.xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/12877840349.pdfIn PDF document text
- https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083682d65a3e---22819372783.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16074215fb3493---jezazevijepidudegim.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+little+french+patisseriePDF 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_off0000c644.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC644	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000de5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE5B	10420 bytes
SHA-256: `6cd32f75497976aaf8e5d676466f5840c5a8536da4f565af31768d992c563f57`
`font_02_sfnt_off0000f5e4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5E4	17696 bytes
SHA-256: `bfb968e0d9153d1260773fc99bbe0a5494e13552f95dd76c428f6d6e7bf247e0`

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