PDF malware analysis — malicious · 5d53c683d5083f8e

MALICIOUS

PDF

91.2 KB Created: 2021-07-23 15:55:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 67cc06f34168f94ad6d9d1bebe2488f0 SHA-1: 5ee763e38e332d77e85f741c39374b1d950702da SHA-256: 5d53c683d5083f8e162797c6ce1452521fb5dbccee8c92c8de3bb660639ac096

172 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external links, many pointing to compromised WordPress sites and using form-builder plugins for file uploads, suggests an attempt to host and distribute further malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent, likely to trick users into downloading or interacting with harmful files.

Machine Learning

Nyx PDF Classifier malicious score 0.9938

Heuristics 8

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.
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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160766f2727c7b---71527349128.pdf In PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a2ae4278977608760032140824f79aca/toradomidudelepagejadij.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e63859b987d---rufolofuvatupizojenenot.pdfIn PDF document text
- http://konferencii.org/js/ckfinder/userfiles/files/raletofomegavimu.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c96fdc10f---91571940419.pdfIn PDF document text
- https://salvamontbihor.ro/app/webroot/files/userfiles/files/jisenumuw.pdfIn PDF document text
- http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609019f91977a---nabaxarujo.pdfIn PDF document text
- http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160eca963bc889---wupegizidezo.pdfIn PDF document text
- http://daoltrading.com/userData/board/file/kuzikok.pdfIn PDF document text
- https://vinamex.info/uploads/news_file/86936656406.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608340ec11873---kimafezafefaxapopalobi.pdfIn PDF document text
- https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/50d65d4063d62cc37ec95823119ce94e/95798277660.pdfIn PDF document text
- http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607379048f5aa---33541596308.pdfIn PDF document text
- https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cd41fe66065---96158273602.pdfIn PDF document text
- https://digireg.es/upload/10192750892.pdfIn PDF document text
- https://weilaimachinery.com/userfiles/files/80275250300.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ru1679qnv9c6f6ere62c20qjjh/32299470362.pdfIn PDF document text
- https://ataru.site/js/ckfinder/userfiles/files/gepinepejatifonuj.pdfIn PDF document text
- http://mchs67.com/clients/6/60/601da637195afcc8544498be66ee72b0/File/80747153083.pdfIn PDF document text
- https://bestrecycledautoparts.net/images_i/file/naratasip.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/7d53b80858982157677a16aef2400ff4/marixomud.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/acc72408299f51d713c80101d7768c1a/tojexapowepegame.pdfIn PDF document text
- https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/34f019fa0615a1d4e9d3fb1edc291893/49439617667.pdfIn PDF document text
- https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5dea04ed14---19500140676.pdfIn PDF document text
- http://chrisnoblelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/55099879724.pdfIn PDF document text
- http://cpbnatation.fr/fckeditor/userfiles/file/fonetadeto.pdfIn PDF document text
- http://altiro.nl/home/tjerk/file/digagi.pdfIn PDF document text
- http://steelbo.com/uploads/admins/u0/files/20210602021407.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=samsung+activation+bypass+apkPDF 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_off0000fc41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC41	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011458.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11458	11028 bytes
SHA-256: `a199035b7d4f4a71c13c5caadfced1542f6a0d152285262e71871966620b53c0`
`font_02_sfnt_off00012dd0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12DD0	19000 bytes
SHA-256: `e0529d7873796584d8c4edb02a3a4055bd38be4f5b502dc8f525cb53ce4abf00`

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