PDF malware analysis — malicious · 4a33f46189fec3d6

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 02:21:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: bdc463501ebc3f7f9053d3edb9018b6a SHA-1: a9340d815f9756751d07f7ffaee8842db328243f SHA-256: 4a33f46189fec3d65abc047e0708deecc2c7ffb25e6fe0f6bd8796b0f2f6f98a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The file's structure and URL patterns suggest it is part of a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=walkable+city+book+pdf PDF link annotation
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1611cb3d958355---xefuxulimugafitexeweko.pdfIn PDF document text
- http://c2r-auto.com/uploadfiles/file/2021083023552973499.pdfIn PDF document text
- http://www.cenlajobinator.com/siteuploads/editorimg/file/74641668055.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078443b3f937---11353806981.pdfIn PDF document text
- https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f112b3e21a8---raregiwovatasiwujeguxof.pdfIn PDF document text
- http://anupbolivia.com/images/files/jadajivili.pdfIn PDF document text
- http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161153fb7a9e88---39628777440.pdfIn PDF document text
- http://tasarimak.com/ckfinder/userfiles/files/17253203429.pdfIn PDF document text
- http://tpdw.pl/userfiles/file/21190711096.pdfIn PDF document text
- https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/5e008b498d3d1d21ff268a6cb2c67df7/finitojesusex.pdfIn PDF document text
- https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8cbdb5f94---77878657361.pdfIn PDF document text
- http://moorheadhigh1970.com/clients/c/c3/c3beaea4c2dff0dfe15f0c96d12524a1/File/moperika.pdfIn PDF document text
- http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b01e60f2ff9---7854218391.pdfIn PDF document text
- https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/97a9df97a1d44940606cb285ebed1cb5/mopedefisejobugiwugerat.pdfIn PDF document text
- http://awarelaxcentrum.cz/user_files/file/zefajopiwamutawapipiwu.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ktvttc8fm78pjndhlkmmibo5f3/65805102169.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160776c1371d39---setegulodibelobokob.pdfIn PDF document text
- http://soles2walk.cz/data/file/pibelozupugiwuzojidunewot.pdfIn PDF document text
- https://relans-nn.ru/images/docs/file/mitosurumolofubozafatuguv.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b253e06790e28abf502a7695d1c1dc3d/ruraxiwipumeso.pdfIn PDF document text
- https://abofahed.com/userfiles/file/38664752943.pdfIn PDF document text
- http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16085c0d1df87e---18632294550.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160920516483e4---bujemudanodokelu.pdfIn PDF document text
- https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fec04b2b983bbba280289a082118317c/wosodadakojipimib.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_off0000e217.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE217	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fa2e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA2E	10580 bytes
SHA-256: `81b5de3c84c2d1763445b2c746387cd90173af5a032882e5d4a29e269aad7e05`
`font_02_sfnt_off00011247.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11247	17212 bytes
SHA-256: `b5444e623a6d676f4d225980bcb68c1e15015ef47163bd7f62967f6c21f93720`

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