PDF malware analysis — malicious · bdb2d3fccf8284e1

MALICIOUS

PDF

112.9 KB Created: 2021-07-16 17:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 573989b5218654739df1e808dd2412a3 SHA-1: f793b83974597602c39afcc39a772985bf300c99 SHA-256: bdb2d3fccf8284e14327490a416ba1a766258f809e21c9b6e8b4d315e3325239

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document identified by ClamAV as a phishing trojan. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of multiple external links and the heuristic firings point towards a phishing or malware distribution campaign.

Machine Learning

Nyx PDF Classifier malicious score 0.9666

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 http://emotionpicturesfestival.gr/userfiles/file/93537067912.pdf In PDF document text
- https://www.hemoroidklinigi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084559e7008e---60528545655.pdfIn PDF document text
- https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d226e04c27d---39820543451.pdfIn PDF document text
- http://pdww.ru/ckfinder/userfiles/files/mubigepafawipula.pdfIn PDF document text
- https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16086f90d76fe6---46398643217.pdfIn PDF document text
- http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607ddfe8b7f5c---jineduxakakuzudi.pdfIn PDF document text
- http://foodchemsino.com/d/files/tipaxivoxiso.pdfIn PDF document text
- https://siam-royal-view.ru/data/files/22960008706.pdfIn PDF document text
- http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1f80519f---reneguragaxizop.pdfIn PDF document text
- https://kompaspt2.com/contents//files/44127859660.pdfIn PDF document text
- https://implantsdentairesdesmoulins.com/upload/editor/file/34158741542.pdfIn PDF document text
- http://sneedfamilyct.com/clients/44919/File/10755591880.pdfIn PDF document text
- http://onlinepravenconsultant.com/uploads/wysiwyg/files/92961917479.pdfIn PDF document text
- http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2dce171585---70000520022.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/f57f9dce1009acab0ecb34cdfc89c81b/wowumanugikox.pdfIn PDF document text
- http://lovellreunion.com/clients/4/42/420738e4954c29d3cfd02fdb1bc9139f/File/jatilotaz.pdfIn PDF document text
- https://whiteplacard.com/UserFiles/file/xijewovugi.pdfIn PDF document text
- http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d93ebe98b5---xuduror.pdfIn PDF document text
- https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/669ae8d8d320c52b69c72cfca9d11af5/93936718038.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4d9240d6c5c8806d566f310a4aebeeff/vuzijivu.pdfIn PDF document text
- https://pachetedeturism.ro/images/files/noforofujipojel.pdfIn PDF document text
- https://groupunsur3.com/contents//files/mitobotuwefunugas.pdfIn PDF document text
- http://etasystem.net/userfiles/files/sagilu.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b179d96955b---65795522108.pdfIn PDF document text
- https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b730d43c325---magefavanowabom.pdfIn PDF document text
- http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160856a9502efc---86439680070.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=existentialism+and+psychoanalysisPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00013b0e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13B0E	17056 bytes
SHA-256: `3d8b2f2c5f51da556d099caa54f98df0a32f3a30bd87a27750be5843612a07e0`
`font_01_sfnt_off00015422.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15422	10880 bytes
SHA-256: `c3c24d3fedf52946b7994c94aca6bcaf90cdb8c6705fcc59ca47fac9e3a86e61`
`font_02_sfnt_off00016d1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16D1E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00018530.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x18530	19132 bytes
SHA-256: `1ef8642f50239cddf0830d6efa6c755e5302858fc5904d146d42d3be39465034`

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