PDF malware analysis — malicious · 5be6a70480a3272f

MALICIOUS

PDF

76.6 KB Created: 2021-09-07 10:30:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 0e332ff1e43e2ca498ec952f6c02bcec SHA-1: 760bc57c23f4ce37dbfa9b1eea130c743c67e9a1 SHA-256: 5be6a70480a3272f7e80739b3b4df4b637215723fda411f44b1c084c29b205d6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting, a common tactic for distributing malicious content or conducting phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://cjmfgx.morefriendship.com/upload/files/wavogalakibiji.pdf In PDF document text
- https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/b97d91d1b0a4dcc062d7bdfdc6b689e8/wuxekigemedofeveravu.pdfIn PDF document text
- http://jolanyee.com/upload/files/202108101117309076.pdfIn PDF document text
- http://noxsun.com/jingkelun/userfiles/files/20210831183658.pdfIn PDF document text
- http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732ef6a70e4---89539294288.pdfIn PDF document text
- http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac6102a2dc---doxix.pdfIn PDF document text
- http://gniortho.com/files/Upload/file/50020246006.pdfIn PDF document text
- http://zsmnowakowski.pl/userfiles/file/5949867874.pdfIn PDF document text
- https://ascinfratech.com/clientprojects/trading/file/gelovava.pdfIn PDF document text
- http://mrpokedb.com/uploads/files/10988997240.pdfIn PDF document text
- https://www.autopsrus.com/ckfinder/userfiles/files/20135096355.pdfIn PDF document text
- https://soechi.com/userfiles/file/36019330888.pdfIn PDF document text
- http://bandenplaats.nl/cmsimages/file/dugadazuziromis.pdfIn PDF document text
- https://hyundainhapkhau.vn/upload/files/54412739182.pdfIn PDF document text
- https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160795d55c3b16---70537618408.pdfIn PDF document text
- http://shqinze.net/admin/upimg/file///janojakubuwibefukajujitin.pdfIn PDF document text
- https://ambalatender.com/upload/files/59066450603.pdfIn PDF document text
- http://orvositudasbazis.eu/images/upload/file/10464274709.pdfIn PDF document text
- https://egokituz.org/files/galeria/files/waluza.pdfIn PDF document text
- http://amidoux-peintures.com/ckfinder/userfiles/files/88233717774.pdfIn PDF document text
- https://essaidafm.com/uploads/FCK_files/file/melafudaromupajo.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a335c447084---46110895431.pdfIn PDF document text
- https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/559edika0habo1q38s98eussh0/pomubinom.pdfIn PDF document text
- http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcceea300e---wesutif.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160f84084abf47---bepojilal.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=ignou+offline+admission+form+2018+pdfPDF 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_off0000c481.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC481	11296 bytes
SHA-256: `c32b6cae8103460f1ff23c4ac5866f4840fe673368c0241250efd2e041c66d0a`
`font_01_sfnt_off0000ded9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDED9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f6eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6EB	17096 bytes
SHA-256: `e0112a1280a33980b748aea4ae255052185b1c0ffd9a8aa714c76a9690429ad2`

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