PDF malware analysis — malicious · eeb255ede6086b0c

MALICIOUS

PDF

83.3 KB Created: 2021-09-19 15:02:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 897586e88d86a3ec4ec8a9199ce06d3c SHA-1: 90a953884d1152c87929ad3d00bd75d7d97acb0f SHA-256: eeb255ede6086b0c1ea6f4acc75a9a26a568f2461635aad3263a0c6a0e075177

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external, potentially malicious sites, likely for phishing or malware delivery, consistent with spearphishing attachment tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 https://pistant.ru/uplcv?utm_term=how+to+take+a+screenshot+on+this+mobile PDF link annotation
- https://propage.q-cloud.net/upload/ckeditor/pages/files/43597832348.pdfIn PDF document text
- http://abaj.cz/UserFiles/File/58100336267.pdfIn PDF document text
- https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/a2ea43c1be004f7bfeaf4b5f5521c5e2/wokefosaxodog.pdfIn PDF document text
- https://soudurelausiere.com/upload/editor/file/1653135412.pdfIn PDF document text
- https://yenhuy.vn/upload/files/8367695644.pdfIn PDF document text
- http://parfumland.sk/upl/49016107830.pdfIn PDF document text
- http://printific.com/images/contentimages/files/40016989922.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613255107b8ef---10521232598.pdfIn PDF document text
- http://scherzerpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/54156841029.pdfIn PDF document text
- http://border-collie.ru/sites/default/files/file/zejijuxumarirolixeje.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136cce4b7676---46683881241.pdfIn PDF document text
- http://dmkaudit.sk/101/upload/file/33277571257.pdfIn PDF document text
- http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/49880033003.pdfIn PDF document text
- http://www.amanuttarakhand.org/ckfinder/userfiles/files/xodijawiketunevizup.pdfIn PDF document text
- http://talk200.com/admin/admin/uploadfiles/file/34907056644.pdfIn PDF document text
- https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/5d435ca6221c4167acf80fc3920dccf9/wonizuvobuvabolurenidedug.pdfIn PDF document text
- http://makinsushi.com/uploads/files/tezofolitatukupi.pdfIn PDF document text
- https://satuldelut.ro/ckfinder/userfiles/files/rujugume.pdfIn PDF document text
- http://sasnowosielski.com/ckfinder/userfiles/files/fovaxeke.pdfIn PDF document text
- http://axi-hohenstein.de/userfiles/file/bipif.pdfIn PDF document text
- http://packagingandfoodmachinary.com/userfiles/file/7867508315.pdfIn PDF document text
- http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145c60db829b---fizapumu.pdfIn PDF document text
- http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b331ff1e52---wafozoxo.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613571db9c3c1---soluwatateluma.pdfIn PDF document text
- https://cuatudongbinhduong.net/uploads/files/25413769395.pdfIn PDF document text
- http://digivideos.net/ckfinder/userfiles/files/lolazubukuvosuredeki.pdfIn PDF document text
- 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_off0000de22.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE22	18592 bytes
SHA-256: `fdb6353b3028171b270fcc04fadc12be800b25d97bde7ad2520a5ac816deb17a`
`font_01_sfnt_off00010e24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E24	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001263b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1263B	10804 bytes
SHA-256: `1073600aa564bad595ecfdd2cb6d660df090d90750f83644b66c372b8268293b`

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