PDF malware analysis — malicious · 799d389bde05800d

MALICIOUS

PDF

80.0 KB Created: 2021-08-15 04:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: b0f0d704e0a9480a4279281012a5411e SHA-1: ad04dedf507c2c4c666b18f011ee1c6b36fbdfb0 SHA-256: 799d389bde05800daf3ffaf37bd99ef9dfe4ccb4a61bbdaed093d81546da2a6e

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which point to compromised WordPress upload directories. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.7066

Heuristics 5

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
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://infrive.ru/uplcv?utm_term=la+reina+roja+libro+precio PDF link annotation
- http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a087d0941---46770315254.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608a30a8c7f41---69733879909.pdfIn PDF document text
- https://100tmt.com/uploadimage/files/20210801165933.pdfIn PDF document text
- http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/s3hojjk0hcv9gcdh97eu090h13/xulal.pdfIn PDF document text
- http://ghinelliarchitettura.it/userfiles/files/9824220264.pdfIn PDF document text
- http://creptiles.dk/userfiles/file/60820109569.pdfIn PDF document text
- http://www.haztartasigepszakuzlet.hu/pics/file/58918463863.pdfIn PDF document text
- https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/04e84eb6856c1d22dc82eb456e4224c2/dijurixerexiwuromobanisi.pdfIn PDF document text
- http://limoride.net/gallery/file/98973205665.pdfIn PDF document text
- http://circuitoinsulargc.com/documentos/file/pijofisejarefurusipaje.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16103006557e30---zewudonenuk.pdfIn PDF document text
- http://bmhs1963.com/clients/7/72/7286fd37811b7a5dece6e69924e4d5ab/File/27658881991.pdfIn PDF document text
- http://amuseonline.com/absite/userfiles/file/39561851468.pdfIn PDF document text
- https://coil.hk/upload/files/nemimomotut.pdfIn PDF document text
- http://tatnhapkhau.com/ckfinder/userfiles/files/lunegarekoperolovew.pdfIn PDF document text
- http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094a0d447c15---gesabenuwijovimojomeduxu.pdfIn PDF document text
- http://werkkledingverkoop.nl/images/docman/files/98291816572.pdfIn PDF document text
- http://iseveranscopy.com/upload/editor/file/bumewofedozafewuwa.pdfIn PDF document text
- https://andrejc.si/files/file/regukemizol.pdfIn PDF document text
- https://directorvincentchow.com/fck_filemanager_upload/file/58924633143.pdfIn PDF document text
- http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160753a8685af7---85000069060.pdfIn PDF document text
- http://mvsexpo.ru/admin/ckfinder/userfiles/files/91312387465.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/f05b1f1c7aa7610571f6374a661d9a68/65306061479.pdfIn PDF document text
- http://kondicionery-vidnoe.ru/upload_picture/file/dakewa.pdfIn PDF document text
- https://tort-art.ru/userfiles/file/vekovovivebaxanikis.pdfIn PDF document text
- http://alibabashipping.com/userfiles/file/suvexejanupakaresawosojaf.pdfIn 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_off0000dddb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDDB	16276 bytes
SHA-256: `98aff72f982070a5baa77e7b7d9d202cd92db0f7bde72b24465478209f81d015`
`font_01_sfnt_off0000f3d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3D5	10328 bytes
SHA-256: `5c2c6dd8c1fe03ff8525f552fd23c0659ab20b5a3eda0c18dbeb7a22b89338cf`
`font_02_sfnt_off00010ae6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AE6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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