PDF malware analysis — malicious · eacfcc6ec883bf57

MALICIOUS

PDF

87.5 KB Created: 2021-07-01 11:36:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: b40330dedc094c07a5a3dd73c1a4a055 SHA-1: fffbd26bf481ee80b3e6ed3584ad474f8cbab71f SHA-256: eacfcc6ec883bf57545d62761e17fb48bff0fc15129204ab462b1569bfc22987

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple links on potentially compromised CMS upload storage and disposable hosting reinforces this assessment.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://beiwendq.com/userfiles/file/97644344129.pdf In PDF document text
- http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/5ac6522e5080fc0ecbc998a2e9c82a8d/mabifopok.pdfIn PDF document text
- http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/98594971248.pdfIn PDF document text
- http://homenet-spb.ru/userfiles/file/zubuvakozelumiguro.pdfIn PDF document text
- https://balajitutorial.com/admin/userfiles/file/tuzupuzonomaraxuxubagos.pdfIn PDF document text
- http://holycrossyouthministryasp.org/clients/f/fa/fa15eac34f6f8ef5a8ada011ffef1578/File/zewofonirakobuwalote.pdfIn PDF document text
- https://aradovan.com/userfiles/file/rufam.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd7d2b970f---84852778672.pdfIn PDF document text
- https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/603daa9f3ec087f8cfc1ec7b463efc9e/50945845389.pdfIn PDF document text
- https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/fd3efff44d17bcb1fb026fb7792a1822/74606384440.pdfIn PDF document text
- http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/91314624723.pdfIn PDF document text
- http://hnspkjx.com/d/files/5753828784.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/7c9e67ce95bc9eee8d72a8205db9935a/74501458445.pdfIn PDF document text
- http://easytravel63.ru/ckfinder/userfiles/files/todulogilafapidozivagu.pdfIn PDF document text
- https://hotel-la-licorne.fr/userfiles/file/48809359642.pdfIn PDF document text
- http://dragonera.cn/admin/userfiles/file/24981536887.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca742515c---jexov.pdfIn PDF document text
- https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609481dc545a6---38848457225.pdfIn PDF document text
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/vrmp5s2tpnpg2uu6uqrk9r5q9n/57605007786.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b87bd9b06---kijojaxixobozuwuruxinuver.pdfIn PDF document text
- https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/ba9e5861236089a8447a42a207dfa3be/diferuje.pdfIn PDF document text
- http://karmand24.ir/basefile/ehotel724ir/files/gafeza.pdfIn PDF document text
- https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/e329a1c1ac24e3e03ea2a85606740a52/zatuzev.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/os6o6atmkeppkclgjr1u4nfsbd/24310117882.pdfIn PDF document text
- https://llibreriaha.com/img/events/file/3022525914.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607c940c6551a---96104083175.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=stress+pc+softwarePDF 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_off0000f2f9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2F9	17500 bytes
SHA-256: `95b60479d3a61a7b9a4bf92cbdb81adbe7dc1d8ba00728f97e75252614bbbabd`
`font_01_sfnt_off000120e7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x120E7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000138fe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x138FE	10392 bytes
SHA-256: `0300e83b5f5e40fb71390aaf98a598ed4711456e17583630e34a708e487e1d44`

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