PDF malware analysis — malicious · b2f1371359898cef

MALICIOUS

PDF

131.5 KB Created: 2021-07-06 16:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 0f7b4b597079165cb970d4666680440c SHA-1: c2536893f76fbbfb1cafcba1c9563efbfa24b11a SHA-256: b2f1371359898cefbe93b22a2451de7f095a80d4956b3792a5c584f18dc8a8c8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan. The heuristics indicate it functions as a link farm, directing users to multiple potentially compromised websites hosted on disposable domains. The presence of numerous external URIs and the ML classifier's high confidence score suggest a malicious intent to redirect users to phishing or malware-hosting sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9832

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://novussiteyonetimi.com/uploads/file/36406250121.pdf In PDF document text
- http://asbufestival.com/uploads/FCK_files/file/vosanan.pdfIn PDF document text
- https://thietbivesinhsonhoa.com/webroot/img/files/mefowul.pdfIn PDF document text
- https://accounting789.com/ThImg/file/90588990771.pdfIn PDF document text
- https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/l63tbehtupkbgl49v07n103k9e/giremusumajek.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/7f9f3ba4e6da0fef963765c8cf32f977/74643177938.pdfIn PDF document text
- https://deltarealestate-eg.com/userfiles/file/74964866158.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/mr24ihjak1nu0b54ed78bcpupc/sugikelojabexibumonovapip.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a461685c768---80731460203.pdfIn PDF document text
- https://addsfly.com/userfiles/file/juladaguvasanobarope.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/zutawenut.pdfIn PDF document text
- https://menlopark.com/wysiwygfiles/file/25584854306.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91cf283bc2---24291170637.pdfIn PDF document text
- https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609704741cf36---xijogiboditisawudobunoku.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/07ca6b327ca59ece54e3a5f3b7fe7f8e/fexufawoginuzudinexi.pdfIn PDF document text
- https://artenika.pl/fck/file/pawobevewebevo.pdfIn PDF document text
- http://asianmosaicnyc.com/userfiles/file/riwejobigowokuvurifawem.pdfIn PDF document text
- http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/30a165ff8e521849bc5a421100ecd44d/63404555511.pdfIn PDF document text
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f284ddd15---20655037969.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0c154df98---43004184560.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/45063810064.pdfIn PDF document text
- https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/6487352835f764d3886fe0b60d2be818/3926327110.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/e495928de93bcb275f97247840b029bf/30337495511.pdfIn PDF document text
- http://flexicourse.cz/res/file/gupatawonesukipilaxavo.pdfIn PDF document text
- http://alliance-ic.ru/uploads/file/kagotajegezarepejisor.pdfIn PDF document text
- http://stlnsk.ru/uploads/file/87447774429.pdfIn PDF document text
- http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609fa8e1eca02---38369275419.pdfIn PDF document text
- http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075c9be42741---xemefexesopube.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=format+disk+to+mbrPDF 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_off0001a015.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A015	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001b827.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1B827	18420 bytes
SHA-256: `62735b3caa986c27c98b52b5de77eef57b51cc1f020844cb7bd102e2e14e3e1b`
`font_02_sfnt_off0001e90d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1E90D	10336 bytes
SHA-256: `51cd81870f9b7460f5c889bf6b8383a4db494e9a7812637d69fc9ee5f3aaa22d`

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