PDF malware analysis — malicious · 61d810d96c19c387

MALICIOUS

PDF

76.7 KB Created: 2021-07-03 15:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 45d3c8dbe4cfc20f5a481266a1ae95f2 SHA-1: c0024b76999c95ad47596b630427f1533fca6a0f SHA-256: 61d810d96c19c38705acc11cb39b4147fe9ff726aaa66e0b15427da91b6dd907

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URIs and link farm patterns, suggesting it is designed to redirect users to potentially harmful websites. The presence of compromised CMS upload links further indicates a malicious intent to host and distribute malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://coretry.ru/uplcv?utm_term=monopoly+game+apk+download+free PDF link annotation
- http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8de092ce6b---8686926811.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16098e78943fed---41059513913.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b309cdb5332---81465339465.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7db4bbcd9---40211654220.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/10e6n00ogquv828osi769m7p87/29695300405.pdfIn PDF document text
- http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07e8c5f7d---26387287359.pdfIn PDF document text
- http://alexhoffordphotography.com/temp/files/file/xapurolokasovol.pdfIn PDF document text
- https://arichaindia.com/userfiles/file/fumetaguz.pdfIn PDF document text
- http://arcdesantmarti.com/biocop/Images/images-editor/file/68694160127.pdfIn PDF document text
- http://cateringkieuan.com/uploads/userfiles/file/30495892242.pdfIn PDF document text
- http://apsara.ru/userfiles/file/foragupajop.pdfIn PDF document text
- http://nordicaluminium.ru/userfiles/file/35474230933.pdfIn PDF document text
- https://coluer.ir/documents/file/nukijipomajomopotok.pdfIn PDF document text
- http://kaowei.tw/image/files/20210610_105356.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a887d315d4a---3526822168.pdfIn PDF document text
- http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607c62ac0bf43---defekapisudipali.pdfIn PDF document text
- https://minipowerpack.net/upload/files/bijageliwi.pdfIn PDF document text
- https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/f326e4b405e431c4de13b666423d2245/ronokosazexowikatudol.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c5f6ecaa0---76977133620.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/23404588594.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab9368d5c0---41749131741.pdfIn PDF document text
- http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2486aba04---61381855623.pdfIn PDF document text
- http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a85b1f6c0---45723479021.pdfIn PDF document text
- http://emirates-offshore.com/uploads/image/file/5663007626.pdfIn PDF document text
- https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cfeeb9d6c43---31847159106.pdfIn PDF document text
- http://buddhavehicle.com/userfiles/file/puvolosadewaxeto.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_off0000c9a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9A2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e1b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1B9	10768 bytes
SHA-256: `47ecb398b2e38b69a06fbaf738ea32edced5b6d673d9e2b02132ce0ea787513e`
`font_02_sfnt_off0000fa56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA56	16508 bytes
SHA-256: `8cf1c30d4ac691b22c4d4a7ffe3936aba355495755661efdee836d9303c263fe`

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