PDF malware analysis — malicious · cc0c5d6209fb16e3

MALICIOUS

PDF

86.9 KB Created: 2021-09-05 17:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: c48b50acf74526b797b2290a0581ac22 SHA-1: c919c0ad2f4010cb35817b4fda2462cfa795ef2c SHA-256: cc0c5d6209fb16e39142bae44cc50e433e4e3e9e49c9a6e3bcd104d807246da7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. These URLs likely serve as a link farm to redirect users to malicious destinations, a common tactic for phishing or malware distribution.

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://goodwill.as/userfiles/file/xajatifitejelorax.pdf In PDF document text
- http://fsoa.cn/userfiles/file/59436744055.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160868003ce6d3---8319603071.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3967059c53---molonojoxobuw.pdfIn PDF document text
- http://premiercontractinginc.com/files/file/besugulesuvelelazaledup.pdfIn PDF document text
- http://hrzservices.com/uploadfiles/file/12310905537.pdfIn PDF document text
- https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/82d977ca127419bccbadc498db570597/fulebexuvixuk.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612f32a28c47a---11310119056.pdfIn PDF document text
- http://teleserviciomalaga.com/ckfinder/userfiles/files/36017997678.pdfIn PDF document text
- http://facilitymanagementassociates.com/survey/userfiles/files/13475456258.pdfIn PDF document text
- http://zjhywt.com/images/upload/File/16400666459.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/a4fdb092afac46dabf0ef28d5fa35cd2/nekevetudujum.pdfIn PDF document text
- https://universal4shipping.net/userfiles/file/77100447410.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/jrbiien3bb9pjmtapmsj3l5ar1/83584130660.pdfIn PDF document text
- https://justforjetscatering.com/userfiles/image/files/5916380849.pdfIn PDF document text
- https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/4a44d243da484d5118c15f4a40649bd1/55736279336.pdfIn PDF document text
- https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/7a797a7fcb4e453264823206de033b18/38220836601.pdfIn PDF document text
- http://lorichphoto.com/pictures/file/76561459896.pdfIn PDF document text
- http://chiangmai-clean.com/user_img/files/24711878097.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b60c5e891482aed3b25391f131f0fbd4/8236976873.pdfIn PDF document text
- http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b876ba91878---vowewububoragila.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e2818f0f22e---16686078855.pdfIn PDF document text
- https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9b1a3818a---bizomorubenuvigeva.pdfIn PDF document text
- http://7tec.ru/userfiles/files/55726716118.pdfIn PDF document text
- http://jarauwerdaenzn.nl/userfiles/file/botavezekokel.pdfIn PDF document text
- http://files.ibiza-ferien.de/file/zijusorilopasewesu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=paralisis+cuerdas+vocales+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_off0000f027.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF027	18068 bytes
SHA-256: `e4d42899018dc933cc7651dfb78357d508335011a15d380bee30fa541de8fcea`
`font_01_sfnt_off00011de8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11DE8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000135ff.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x135FF	10580 bytes
SHA-256: `79f153eb0423d1aee7c37204a3054e8e92eb32c33d5e72b0f72859eeeb555537`

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