PDF malware analysis — malicious · 0a0392de112b4ace

MALICIOUS

PDF

89.1 KB Created: 2021-09-22 09:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 48600bd2e7f5fb7b9626dba6c3d78c1f SHA-1: f98cad0b1a27cbeb4bb611407b506a0bfaf16a9d SHA-256: 0a0392de112b4ace0254d7f5e7b87b43673b199754e20b940c2f4e56badf3687

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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://pistant.ru/uplcv?utm_term=app+for+android+to+facetime+with+iphone PDF link annotation
- https://nsck-cykelmotion.dk/userfiles/file/welomugo.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614029e7523ba---5582093031.pdfIn PDF document text
- https://drinkpoint.com/uploads/files/43403451774.pdfIn PDF document text
- https://aayams.com/userfiles/file/bobekusi.pdfIn PDF document text
- http://degeninhotel.ru/admin/ckfinder/userfiles/files/pepij.pdfIn PDF document text
- https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f8e41a26d98b220fa6f65276cb352049/83743171818.pdfIn PDF document text
- https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16131157f59fd0---werusopomakefafeguguk.pdfIn PDF document text
- http://saothienemb.com/uploads/images/files/14378613164.pdfIn PDF document text
- https://kompaspt1.com/contents/files/zijinifedubanin.pdfIn PDF document text
- http://air-ned.com/uploads/files/mefurokogewuzitisexatat.pdfIn PDF document text
- http://www.dfdtrading.sk/ckfinder/userfiles/files/587915396.pdfIn PDF document text
- http://thuexedanang247.com/uploads/image/files/28631721438.pdfIn PDF document text
- https://sklep-pinokio.pl/web/uploads/files/63355572427.pdfIn PDF document text
- http://improntediteatro.it/userfiles/files/21163498708.pdfIn PDF document text
- https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613589d4be029---48394521672.pdfIn PDF document text
- https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca64d9945c---gaxepabapu.pdfIn PDF document text
- http://nhasachnguyenvancu.com/Images_upload/files/37080677894.pdfIn PDF document text
- http://chrisdepanneservices.com/Sites/cds/files/51946101277.pdfIn PDF document text
- https://kingbakerypans.com/userfiles/file/lenuvumawobetupobenuwom.pdfIn PDF document text
- https://promobryansk.ru/userfiles/files/62523594007.pdfIn PDF document text
- https://nirmalujjwal.com/public/ckfinder/userfiles/files/32540748853.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161330daeeb0f9---xejexesunexuzidaxezenem.pdfIn PDF document text
- http://feg.vn/uploads/files/76082350650.pdfIn PDF document text
- https://locktactyuma.com/ckfinder/userfiles/files/40147433484.pdfIn PDF document text
- http://sbairs.com/datas/files/9169552010.pdfIn PDF document text
- http://koppeika.ru/userfiles/file/lirose.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_off0000f310.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF310	10736 bytes
SHA-256: `ab06c9e50f5534e4b0e5b5914a23e9dbcc5e6f82b08924da29de1c63bc91e821`
`font_01_sfnt_off00010b9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B9C	19284 bytes
SHA-256: `c65f1548d00670e131f4df2160c9914e395cdd5a7ba56bcd6d90c1bc7f9735a2`
`font_02_sfnt_off00013e54.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13E54	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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