PDF malware analysis — malicious · 70b8322e1f6cb68a

MALICIOUS

PDF

85.1 KB Created: 2021-07-30 22:57:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: 2fb9487241b4e3476889e634256a1794 SHA-1: e57c7309ccfcb2bfe038bcc92700b6ad4e2ad6e6 SHA-256: 70b8322e1f6cb68a802829f1e0eee5f53f1a6fa9145a4d792fa70c38389c2460

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the detected malware indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9902

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://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073d26d509d7---tikuwozuba.pdf In PDF document text
- https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/i763s21nv9mcsc2f241u2i22ii/gidexarekepe.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/uqrs9ivep1n7br8vbsarjknj21/1955372426.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a1a3256f---jaxorelugobenegu.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c70c2c0b7---sugaliguzaguzurugamo.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/f82d3a5ca1f5519b8c753adcd352de67/35321951388.pdfIn PDF document text
- https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/1016a680633c5505308ee3458f3906c5/52397872000.pdfIn PDF document text
- http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/m9r02su5s8qspmgmbqs27h1fi5/fifowotesidukojujevutawus.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/8b698aca6e8fb8142c090150dbdcf8b0/vusujakusupofipe.pdfIn PDF document text
- http://hgbs.de/userfiles/file/40894110541.pdfIn PDF document text
- http://visit-pune.com/userfiles/file/guvabagunuwo.pdfIn PDF document text
- http://canvangdientu.com/images/file/61305623529.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f7c544202---bidezegi.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094a1f44e9c1---jewuna.pdfIn PDF document text
- https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/4c8c32bb2e0f966d5795b33137ecfa61/lotabulumivivagozodufotow.pdfIn PDF document text
- http://vtvxm.vn/userfiles/file/29836512294.pdfIn PDF document text
- http://resheto.ru/users_images//fck/file/nilirelajilebaxilunek.pdfIn PDF document text
- https://kasihpaham.com/contents//files/1380602598.pdfIn PDF document text
- http://lhsclassof1971.com/clients/74120/File/vijidisoxowedugal.pdfIn PDF document text
- http://lorofilmes.com/Uploads/ckfinder/userfiles/files/20354161798.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b67d70dc4---nenezogetidapuwesutup.pdfIn PDF document text
- http://dainichiji.com/upload_ckr/files/55219762032.pdfIn PDF document text
- http://icwest78.com/clients/67591/File/legolidamoj.pdfIn PDF document text
- http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608d81c487c59---sewimeneruzazakonanu.pdfIn PDF document text
- http://machinegroup.ru/img/outer/files/gamatadinomajadoli.pdfIn PDF document text
- https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/pqtaha8jhaerotsapi7r1pr13o/kudolazuru.pdfIn PDF document text
- http://vce34.ru/attachments/file/fujovusirivavedepusebujos.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=download+script+diamond+ff+game+guardianPDF 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_off0000e6ce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE6CE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000fee0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEE0	16944 bytes
SHA-256: `9c8ef64c16d02b2c3d068c440e5f40f09adbb4f74369c6415d0447986bc07c35`
`font_02_sfnt_off00012b17.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B17	11152 bytes
SHA-256: `4c05fd861829a1744e8dbc0df69012198b7d41530b5bab1f5d52a39725f1508f`

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