PDF malware analysis — malicious · 3b61df889f70619a

MALICIOUS

PDF

86.7 KB Created: 2021-08-16 13:38:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: db6964a51fdec458ecc699764f39df9d SHA-1: dbedeebaede7426fe3bc62c94e8780cca4be1aae SHA-256: 3b61df889f70619af6879a4bc69660ade1622a7f0b442fac6facccf8f68e35f0

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded links are consistent with a spearphishing attachment attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9977

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://laborke.ru/uplcv?utm_term=bridgette+wilson+2021 PDF link annotation
- http://floral-design-lindgens.de/userfiles/file/31322707155.pdfIn PDF document text
- https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b8b556d84---misobiwinarosububitu.pdfIn PDF document text
- http://kuppersbusch.hu/userfiles/files/modepulugejotepegefetir.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/cs66iq9bkolfklj398h89j50hi/94834725500.pdfIn PDF document text
- http://whalesart.com/uploadfile/file///2021061601250472.pdfIn PDF document text
- https://campermagazine.tv/public/file/wotamugivutogomudi.pdfIn PDF document text
- http://ducthanggroup.com/webroot/img/files/56188097191.pdfIn PDF document text
- http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7e30daadc---5424334751.pdfIn PDF document text
- http://business-plan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/52390706532.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/1adf221e17763164417de841eda3abe6/zitidetimedisulozivix.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1eb3c4532---68378809537.pdfIn PDF document text
- http://chapelguild.com/images/usr/xinerowewogivunam.pdfIn PDF document text
- https://buyafranchise.org/files/files/wirabira.pdfIn PDF document text
- http://leebyenghun.com/new/upload/board/files/fusodaledifoxuxiwekusis.pdfIn PDF document text
- https://nirvanaegitimpaket.com/calisma2/files/uploads/27693620990.pdfIn PDF document text
- http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/38777693986.pdfIn PDF document text
- http://webbuilders.com/files/file/89035098394.pdfIn PDF document text
- http://osc-pribor.ru/products_pictures/file/japonikivimanuga.pdfIn PDF document text
- https://parc-hotel.info/file/gefobozev.pdfIn PDF document text
- https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/eiu48gb37dv1861lofvghh9ipf/mupufi.pdfIn PDF document text
- http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160797e6025649---detuzufuzipoximuxizuximo.pdfIn PDF document text
- https://www.ccs-corporation.com/ckfinder/userfiles/files/41584319065.pdfIn PDF document text
- http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906f3b53bb6---6757841402.pdfIn PDF document text
- https://bilalyapidekorasyon.com/userfiles/file/28789084157.pdfIn PDF document text
- https://ohcsi.com/ckfinder/userfiles/files/sasajisibalijogotujib.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_off0000eea5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEA5	10692 bytes
SHA-256: `6052ce78cb2182ff0f08786abdfee24073ca0c98103c5e05d945fdca14b7ddf2`
`font_01_sfnt_off00010733.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10733	17076 bytes
SHA-256: `c5db6c59ab4225a2773dc0f3ae24aad1080baa38827203b903d140cfd2b99ab5`
`font_02_sfnt_off000133ea.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x133EA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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