PDF malware analysis — malicious · c5e986aaf294f7ac

MALICIOUS

PDF

76.7 KB Created: 2021-08-09 13:41:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: dedee95a889c87b1e85378835873da53 SHA-1: 73daadf125f28565ec16af4aa5306f27baa5684b SHA-256: c5e986aaf294f7ac538ca46dad346bfe7ba78316f9936998b24850cbcdcf513b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external PDFs hosted on compromised websites, suggesting a link farm or phishing campaign. While no scripts were directly extracted, the nature of the links and the detection indicate a malicious intent to lure users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9934

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://pogservice.ru/userfiles/file/56623446236.pdf In PDF document text
- http://tryinvest.eu/userfiles/files/vovajojalirejukaxowoditer.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b95030c13fc13f31addbf14558b6cd4e/rilolera.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a48940367d0---79807259019.pdfIn PDF document text
- http://rulada.by/upload/editor/files/wudegitomabinovojuga.pdfIn PDF document text
- http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71c42e08fe---62742494330.pdfIn PDF document text
- https://papiratisk.cz/soubory/66734437335.pdfIn PDF document text
- http://carefirstwalkathon.com/clients/8/89/89514deb4c0e8807eb046cac28c4977f/File/tumun.pdfIn PDF document text
- http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5b70cc6ba5---nabazapelogojeruvefebogof.pdfIn PDF document text
- https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/d88ca6098bcec1967e90e67ba84c967c/tatiso.pdfIn PDF document text
- http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c118f90a620---89287283345.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160928c99d9f49---20369237249.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5cf3b0357---miloganadezapibevikesuxi.pdfIn PDF document text
- http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e929872b620---3101665329.pdfIn PDF document text
- https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160fc0486abda4---75650633238.pdfIn PDF document text
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/48a604692869ee03e53858559c3d68ce/67292345929.pdfIn PDF document text
- http://basyapiemlak.com/yukleme_klasoru/userfiles/file/rivamapodikizutejipan.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/9k2199cpoijnsd2nubo6vit9tp/tilovigalirixapeberewusij.pdfIn PDF document text
- http://mitchelllawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fidabexulekenudej.pdfIn PDF document text
- http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gupefepaxizedam.pdfIn PDF document text
- http://tamlaproject.com/userData/board/file/67392921008.pdfIn PDF document text
- http://annabarons.lv/files/files/rizopu.pdfIn PDF document text
- http://budaikepkeret.hu/uploads/file/zijemesebafumesol.pdfIn PDF document text
- https://ubk-sad.de/azubi/userfiles/files/67911393887.pdfIn PDF document text
- https://pasarant0g3l-turbo-h1t.com/contents//files/17987356761.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/f26a98d150b3bc78751d8ea4fa1a2d26/fufepewegijigubumudope.pdfIn PDF document text
- http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a85a8af06---kikagebokakanalixivanapo.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+find+reverse+phone+number+for+freePDF 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_off0000c87c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC87C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e093.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE093	10936 bytes
SHA-256: `2f98c2853e5e052d4fe219db23afa120f122e8fec71a650fcfb200e2d2b33b01`
`font_02_sfnt_off0000f97c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF97C	16548 bytes
SHA-256: `be3fd863c32a6e3d2cef31f79c42b7536868ad38f2c59c203a38cda02534e775`

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