PDF malware analysis — malicious · 09380c205a80bb71

MALICIOUS

PDF

74.6 KB Created: 2021-09-04 02:37:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: e0f122a2dec3cf558c85c878e00326dd SHA-1: f6d42e539b69f82f4ff55ca0288dba8d427836c9 SHA-256: 09380c205a80bb71c6ab8696e06143215ef2fdb4ca2c04b1a71803bfd7c58edb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and the presence of embedded URLs point towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=immunology+and+vaccines+pdf PDF link annotation
- http://jinistudy.com/_UploadFile/Images/file/siniruzetoluw.pdfIn PDF document text
- https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a15c0d203c6---nisukiketumodazepolaveto.pdfIn PDF document text
- http://princeverma.in/uploads/files/gokoz.pdfIn PDF document text
- http://patp1ryb.ru/media/file/42466091169.pdfIn PDF document text
- http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/49099165152.pdfIn PDF document text
- http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b6p1fa55dqdv5g5e26g64897u7/43300262442.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/8a57111607871d96b86604b68824f117/3215690176.pdfIn PDF document text
- https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/964b9fa3abf3eeff45897388b3078f63/wuboku.pdfIn PDF document text
- https://bursakaynak.com/userfiles/file/57120218306.pdfIn PDF document text
- http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea850f1ebe---fosefinejukamagukaburo.pdfIn PDF document text
- https://alrashed-alsaleh.com/userfiles/files/59811340834.pdfIn PDF document text
- http://maduraigarlandshop.com/userfiles/file/zixirufanuwujekixeduwa.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/24250ef1a0939252ae4348da71b689c3/razaraxoposowiki.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608568f801ab4---kibateden.pdfIn PDF document text
- http://duocthientam.com/uploads/ckfinder/files/14667898877.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8b4dcf731---75067724649.pdfIn PDF document text
- https://cafe-malaysia.com/contents/file/lokemurogizuvawemu.pdfIn PDF document text
- https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/23da2a5357f9321216b143d0785f7673/zitijukutiweke.pdfIn PDF document text
- http://gvs-russia.ru/admin/ckfinder/userfiles/files/furabokazenewomibamar.pdfIn PDF document text
- http://giga.sk/storage/file/30449713957.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/f899c3f318c0b0fcbe014640483d9eeb/nafevutoroxewok.pdfIn PDF document text
- https://bliznacite.com/files/19567395528.pdfIn PDF document text
- http://e-park.es/img/uploads/files/wofaridaluvis.pdfIn PDF document text
- https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/acc62e5ab0f52b060762cbaaeaed0e62/41445528852.pdfIn PDF document text
- http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160a81e08cd65a---56849335343.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_off0000c1e5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC1E5	16288 bytes
SHA-256: `09cc0a7cad32a4b72198ac8f1b04334e7e8726c1f13bf97ef59efff1d4006a29`
`font_01_sfnt_off0000ebbe.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBE	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000103d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103D5	10996 bytes
SHA-256: `257fcddb074b62c017f0d37e716924540ab2d2fa0e4c34152535a1a629dde719`

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