PDF malware analysis — malicious · 3a1451c118bf8e73

MALICIOUS

PDF

88.8 KB Created: 2021-06-30 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 9ba23107f1258dd1ad01866803d42b1c SHA-1: b64263ec34f1a0a58803267805a1fd6f584fe30e SHA-256: 3a1451c118bf8e73598bf2a1e24b0eee705232577e75b9e4e60710d33a6e7a5a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to numerous compromised WordPress sites, likely intended to lure users into downloading further malicious content. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest a phishing or spam campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9765

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://wastran.ru/uplcv?utm_term=patient+rights+and+responsibilities+pdf PDF link annotation
- https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ep5j306q9ec0dvsgvjt8te45m5/zugolux.pdfIn PDF document text
- https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/in85dajh0ecbadono6m0qdl91o/8987791154.pdfIn PDF document text
- https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/be56db1f0a9b6bb20e405cdd3d101154/59259393975.pdfIn PDF document text
- http://bfr-bialapodlaska.pl/userfiles/file/94003938432.pdfIn PDF document text
- https://pui-vital.ro/msg_media/file/gexusubigaw.pdfIn PDF document text
- https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/vl7gv1t7n8n2q9dmhageqjrhq0/nixakesatawavo.pdfIn PDF document text
- http://studioboscono.it/userfiles/files/muzitafopogerajeloge.pdfIn PDF document text
- http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a47494cbe23---wubisugudalifomijefot.pdfIn PDF document text
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/rhu1a9d51651f09406j05j58au/57537669173.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9797b6d5a---89515147181.pdfIn PDF document text
- https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/db8c232a9955074ac89afd858401353c/42816564449.pdfIn PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160789dc60aac7---vusatazugigutegurixoj.pdfIn PDF document text
- https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/6265e1171cabb4de62b25f2e322edc12/86862990356.pdfIn PDF document text
- http://geologocarmignani.com/userfiles/files/74141258036.pdfIn PDF document text
- https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160877b527c3c9---90065390668.pdfIn PDF document text
- https://xuantruongtech.com/images/ckeditor/files/nizen.pdfIn PDF document text
- http://winkeleninzundert.nl/uploadimages/files/33208723366.pdfIn PDF document text
- http://kythuatviet.vn/uploads/userfiles/file/sukobalagake.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704d983e0c9---13331273052.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/0a1f61210370edfb3d887f3b557be264/wipomixezevuxawaluvizaxu.pdfIn PDF document text
- http://secretinvitation.net/images/files/48484617366.pdfIn PDF document text
- http://cnmrobotics.com/files/files/96145591323.pdfIn PDF document text
- https://nisahanpin.com/calisma2/files/uploads/xapilalukinawefikesukatu.pdfIn PDF document text
- http://creativeindustries.ru/uploads/userfiles/file/fadaxuwepoburuxovitoxarot.pdfIn PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/p55o7vc6ha664sfkdalu8kt2k9/segeb.pdfIn PDF document text
- https://otartufo.com/ckfinder/tartufofiles/files/nosegezizajeterelijalep.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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f1f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1F4	10920 bytes
SHA-256: `f7d6835679f7750fcd1bf926c14c6b7a8de083e35a7a7e3b3bb2b6915f06c175`
`font_01_sfnt_off00010aa5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AA5	1636 bytes
SHA-256: `e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500`
`font_02_sfnt_off00011272.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11272	16512 bytes
SHA-256: `c397744995462ed807f973fb9ea16fac4a5015f994c77e7cf145a35d26d89b32`
`font_03_sfnt_off00013d26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D26	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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