PDF malware analysis — malicious · 6e4b6ae861b500ca

MALICIOUS

PDF

97.8 KB Created: 2021-06-27 19:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: edaf3b5bf80de119edad66cbe7dd8bf6 SHA-1: af904d092aac8cab4739ee3df05ba63837e6d790 SHA-256: 6e4b6ae861b500ca0aff0a59280abd1ddec13727972cf0a2606f4c825dcd5039

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

Nyx PDF Classifier malicious score 0.9107

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://gorisum.net/fckeditor/upload_file/file/74424754479.pdf In PDF document text
- https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfcde17d6f---94346089368.pdfIn PDF document text
- https://foundryindia.org/userfiles/file/vivatunutelojexaja.pdfIn PDF document text
- http://mientaytourist.com/uploads/files/nadefuvudizediwutubafipat.pdfIn PDF document text
- http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/3011877854.pdfIn PDF document text
- http://aucoindeshalles.fr/menu/file/54038970031.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607491b60ae98---xobugesatumifofugakad.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/32e5fd58d7fd5a48e9721ac2aea11909/99495615415.pdfIn PDF document text
- http://svsteinfurth.de/radsportfiles/file/wibuwit.pdfIn PDF document text
- http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/zezimodol.pdfIn PDF document text
- http://thegrcinstitute.org/app/webroot/js/ckfinder/userfiles/files/julozadal.pdfIn PDF document text
- http://songhandiban.com/uploadfile/file/2021061919320973499.pdfIn PDF document text
- https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/cf1367a216be5dd6b40d592a242154ea/mibuwujoxowavuke.pdfIn PDF document text
- http://srihemkuntsahibfgp.org/hemkunt/userfiles/file/rejabaru.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ec3b4055---saxug.pdfIn PDF document text
- http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03e8d9c760---24747552665.pdfIn PDF document text
- https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/t0jhpd94qn9n7rk6qev2sjm4j4/39466340903.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/iinmpd0kjva1di806389ro0bkj/92109284625.pdfIn PDF document text
- http://royalwedding.jp/images/blog//file/tadisoguj.pdfIn PDF document text
- http://webbuilders.com/files/file/megujanowixunekatudokam.pdfIn PDF document text
- https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/2b45ab7e9ed3b9a79317d0e1e1adad9d/70474286367.pdfIn PDF document text
- https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f25ba0a0cadb0ea790c5613a4a5988c4/rivipipi.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29a3148986---14883608158.pdfIn PDF document text
- http://indovinandoilmondo.it/themes/userfiles//files/gimipapuwid.pdfIn PDF document text
- https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/21192083261.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/bf3ccea3f5c25253cd4a09865dcd3839/zobovizeropaxujisumivo.pdfIn PDF document text
- http://strategie-online.net/catalogue_dynamique/file/xadutoviriwepifonalage.pdfIn PDF document text
- https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c15027db27---96875508104.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=find+the+area+bounded+byPDF 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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f7e2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7E2	19264 bytes
SHA-256: `0868e31126bee594eb68f1ec1f3ae1b30c22bbdfdf2ddfe48c061ed69a2fb58b`
`font_01_sfnt_off00012b21.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B21	16088 bytes
SHA-256: `450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c`
`font_02_sfnt_off00014056.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14056	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_03_sfnt_off00015863.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15863	1780 bytes
SHA-256: `94da071d87cd7ee37ee961f4999d5c8ba7ea74871ed8c8102e48280920c52ce6`
`font_04_sfnt_off000160cb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x160CB	10460 bytes
SHA-256: `17cb9763a7d36d7cc800083d8ce912e076429e0440575f5b446d5466ed6c3067`

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