PDF malware analysis — malicious · 4163436a2fa623a5

MALICIOUS

PDF

74.8 KB Created: 2021-07-10 09:03:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 1f276b704a82e46abeb069abf731dd13 SHA-1: 0a28a6a0667bdf99a9d55094973cf154abfc39ec SHA-256: 4163436a2fa623a55d7630f692f4711acd7a3d8bcf32ced2a7f0dbaff6ea065a

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as a PDF containing a link farm, with multiple URLs pointing to compromised WordPress sites. The ClamAV detection 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0' strongly suggests a phishing or trojanized document. The presence of numerous links on potentially compromised infrastructure indicates an attempt to lure users to malicious destinations, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier suspicious score 0.4750

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://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff6f0c2ee1---50478098490.pdf In PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6e4e14a07---25126681528.pdfIn PDF document text
- http://hurtglass.pl/upload/file/bumaxuz.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cec688e67c---jovipuwul.pdfIn PDF document text
- https://gtselect.fr/ckfinder/userfiles/files/51204519525.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/bagoxewoluzowatuxawobowu.pdfIn PDF document text
- http://closehorses.com/userfiles/file/fowadakif.pdfIn PDF document text
- https://cometsecurity.in/admin/userfiles/file/zabenenujupujene.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6edc8d362---94574339803.pdfIn PDF document text
- http://xn--80aamdqpfpr.xn--p1ai/upload_picture/naxijirenufosulebapado.pdfIn PDF document text
- https://linoforti.it/file/gomewekolilija.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ccff3250d80---regagadirajebemus.pdfIn PDF document text
- https://laps.pl/userfiles/file/xamizewu.pdfIn PDF document text
- https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/21949218293.pdfIn PDF document text
- https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607619f5b2d71---zapubarojow.pdfIn PDF document text
- https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/en3q0b76i6cg9m26gujfrpq9e1/78112444415.pdfIn PDF document text
- https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/d3db9d8e5d5e8856883eacd11e656b91/xebisevokolojotujudutona.pdfIn PDF document text
- https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/e945b782cfbf4ef1cc0d4e97a75a969c/22367900885.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a1774e9e564---71777344579.pdfIn PDF document text
- http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/27073454124.pdfIn PDF document text
- http://samuiluxurytravel.com/Uploads/file/vupanalelipoluwi.pdfIn PDF document text
- http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b05954bb065---zobobejoxafisudamuzadexiv.pdfIn PDF document text
- https://hyundainhapkhau.vn/upload/files/56813234447.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=swain+meaning+in+englishPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d7cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD7CB	17692 bytes
SHA-256: `32917411921fe8f81b338beec0d1d77c4d6c51ce2c5dfef03dea359c15264832`
`font_01_sfnt_off00010615.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10615	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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