PDF malware analysis — malicious · bd5e562063036bcc

MALICIOUS

PDF

88.5 KB Created: 2021-07-01 00:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: a5d9b4702bcb1b140182eea2701c3dce SHA-1: c755eb2b5e5371f9ab32e777cd6135622f9848bd SHA-256: bd5e562063036bccf60bc0ed38a39167c95e31476abd3e7ade48d543b099bb35

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute further malicious content. The presence of numerous external URIs and the compromised CMS upload links indicate a phishing or malware distribution attempt.

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://nomylo.ru/uplcv?utm_term=abbey+psalms+and+canticles+pdf PDF link annotation
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f794bacd5e---gevixabuv.pdfIn PDF document text
- http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/fti1j6dvv1prcm83p0cqmtqsdj/buzalatodirefa.pdfIn PDF document text
- http://dalnoboy.org/data/filestorage/upload/files/dipamebuzaxugojopina.pdfIn PDF document text
- http://jar-ted.pl/file/45052933981.pdfIn PDF document text
- http://bajajsports.com/userfiles/file/segupekuzusolak.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/72d411c6fb6ef8b1b10d9f26b5749fc3/zenujatibifarotuni.pdfIn PDF document text
- https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f818a1a39---nodera.pdfIn PDF document text
- http://www.radiooro.com.mx/media/images/uploads/files/64412606664.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5ddde5ad---22030076941.pdfIn PDF document text
- http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce26c7ac5e---naxabemevilulofol.pdfIn PDF document text
- https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/982e3e2a3c703900244ada1bdc019887/1592702814.pdfIn PDF document text
- http://turexpert.md/userfiles/images/file/30326377503.pdfIn PDF document text
- http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942e5869f36---83507871712.pdfIn PDF document text
- http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b79ec10f11c---nefisuwi.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/2b06a161d2cbf47fd23da19d4322514b/6589311842.pdfIn PDF document text
- https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1386eeeb3---nudopevuwonerojixoduka.pdfIn PDF document text
- http://qkmedica.com/uploads/userfiles/file/7956640616.pdfIn PDF document text
- http://voxel-avocats.fr/uploads/file/26286653172.pdfIn PDF document text
- http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886ba841a6e---15693541207.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/4gdqemc65le9njlmpjmp2e6c54/bofovixujunim.pdfIn PDF document text
- https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/23259632684ef9bd5151a66dc6b94619/61210419046.pdfIn PDF document text
- http://alexandraharris.com/clients/36054/File/vowaposoj.pdfIn PDF document text
- http://rauvuonsach.com/images/uploads/files/kikakomosibevodapis.pdfIn PDF document text
- https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609840c4dd20f---90536219742.pdfIn PDF document text
- http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774f0d8a2b6---jukirodonubopagi.pdfIn PDF document text
- http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823c125db77---47145074624.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_off0000f48d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF48D	10796 bytes
SHA-256: `9a4bdefacf13bc0c87b4f6f6f0a44cffbb0d3dcb1fa953ee15c64bbc730b07d8`
`font_01_sfnt_off00010d39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10D39	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001254b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1254B	18396 bytes
SHA-256: `d67c18991ae81d28cb19cc19a130ddf9f1c297ecbe5052e1cbd9f26c9be880a2`

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