PDF malware analysis — malicious · 8c06e251cb52dcf2

MALICIOUS

PDF

83.3 KB Created: 2021-09-07 18:25:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 79b427e4a03566861bde4c6bfee25c3f SHA-1: 49bd32cd27a33343374b1de5077b86f309ab92ef SHA-256: 8c06e251cb52dcf2eabc3d3c8aab566c57d75b6a353d77b009fa590feb80605f

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF contains embedded JavaScript and a link farm pointing to multiple PDF files hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to exploit PDF vulnerabilities or redirect the user to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

Heuristics 7

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.
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://dalaichau.com/files/xupomosowis.pdf In PDF document text
- http://hladonural.ru/upload_picture/2723678862.pdfIn PDF document text
- https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce09858501---1282461180.pdfIn PDF document text
- http://christschoolblr.in/userfiles/file/xewepufusanebuzuvux.pdfIn PDF document text
- http://volareinmongolfiera.it/userfiles/files/20511992628.pdfIn PDF document text
- https://tndvn.com/js/ckfinder/userfiles/files/48812774397.pdfIn PDF document text
- https://artasedanasingaraja.com/uploadfck/file/83683333496.pdfIn PDF document text
- http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16093a4331b293---kejodiwifofujorotawavanag.pdfIn PDF document text
- http://co-wemart.com/careeruserfiles/file/ganuwufolezidavoregomi.pdfIn PDF document text
- http://sclifeguards.com/clients/16854/File/gajarugarutiwodiwurafox.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/9r05j92kevj86nvtfp99krm5v9/5087821805.pdfIn PDF document text
- https://sp-pir.ru/wp-content/plugins/super-forms/uploads/php/files/12381a642f023b1d16628b1c56618268/guvawitakolelasidenoru.pdfIn PDF document text
- http://prinsart.ro/uploads/files/59356430979.pdfIn PDF document text
- http://hotdeals24x7.com/ci/userfiles/files/xazadorazesona.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609417b026fde---17982461894.pdfIn PDF document text
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6d5741e250---wotuvonaxexaziniliwal.pdfIn PDF document text
- https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4219a528b22972f6a7867c8b74813e41/87344934639.pdfIn PDF document text
- https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d3c2b59f5---pizakodejenilejurupus.pdfIn PDF document text
- https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdac0295d52---64116364128.pdfIn PDF document text
- https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/rn4d4iuvmkurkkcgluce7jdii1/45157291548.pdfIn PDF document text
- https://agatanorek.com/files/file/65284524739.pdfIn PDF document text
- http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6291de18b2---watuvudisovuj.pdfIn PDF document text
- http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/nukobu.pdfIn PDF document text
- http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/07ih59u06eun5tu64r1gvfok26/fuxusa.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c3890ee26a---karowopizo.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4c2921346---lojomawikosebe.pdfIn PDF document text
- https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/1ae531668f886dd313238fb085ab89f6/gixavexepemuvagev.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=multiplication+and+division+word+problems+year+6+worksheetsPDF 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_off0000de34.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDE34	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f646.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF646	17792 bytes
SHA-256: `435cb368f05adfe3950a01b869d1b47b85866e13185ea778c70f57404ad91154`
`font_02_sfnt_off000123b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123B9	11540 bytes
SHA-256: `da100e47491d4cfdc204cc72edd0b6df86cbef6ce95a25b8aaf4ba91e24d8098`

Open this report in the interactive analyzer, or submit your own file for analysis.