PDF malware analysis — malicious · 9f75641e1f55561d

MALICIOUS

PDF

81.4 KB Created: 2021-09-03 22:35:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2421cd524402393f67457bcc383e6cf0 SHA-1: 702fc8e5a4a1a472c997b20de9c429f5bbb71106 SHA-256: 9f75641e1f55561d8e5a9181d97d05ace7ec57ba454334762c999c637113889d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://queure.ru/uplcv?utm_term=trump+university+real+estate+101+pdf PDF link annotation
- https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f2c5eb5ab---1514205251.pdfIn PDF document text
- http://wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/33597135769.pdfIn PDF document text
- http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073203d4efed---34851200146.pdfIn PDF document text
- http://ekachaiguitarist.com/ckfinder/userfiles/files/fekowaxojog.pdfIn PDF document text
- https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/546972d8e6936bd89032ba150f45e140/falusokoputemufi.pdfIn PDF document text
- http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5784e76c5---jufikadizodujoladarosulup.pdfIn PDF document text
- http://carneslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95758594971.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160a0542f3c98a---vodipipeti.pdfIn PDF document text
- http://le-lemniscus-incandescent.fr/ckeditor/upload/files/3927556944.pdfIn PDF document text
- https://giorgiosantinelli.it/file/15562897732.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/kivuluraxuzigivulabuvu.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f77b6336359---3955850978.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/48237798834.pdfIn PDF document text
- https://rubyyadav.com/nbloom/fckuploads/file/37023996252.pdfIn PDF document text
- http://tryinvest.eu/userfiles/files/miduwifevumogax.pdfIn PDF document text
- https://stvorki.ru/files/file/mevumoladobuka.pdfIn PDF document text
- http://planetamama.ru/files/file/tidomikez.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/f909271b80f838e97cd96f5d3abbf9fe/57800982394.pdfIn PDF document text
- http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e09716fdb---68620788281.pdfIn PDF document text
- https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e8b48d0ffb---16620022768.pdfIn PDF document text
- http://muzeumostrowiec.pl/obrazy/file/dupozoseni.pdfIn PDF document text
- http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161111207a8805---89328945776.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16095cc83adc50---27698981950.pdfIn PDF document text
- https://sudhirsachdevaclasses.com/ci/userfiles/files/nunugafobepikovokefe.pdfIn PDF document text
- https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/r7hkklj57h2po0th3u8u9p1do2/ladorum.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_off0000da95.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDA95	10956 bytes
SHA-256: `4e6e335cf25a8a994cdee981aed1ec468f9e12a97d6f6950843fdbed32a855fa`
`font_01_sfnt_off0000f416.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF416	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010c28.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C28	16800 bytes
SHA-256: `3171adb648830f5d1dbe0176211118ef600ee47f72bd4c023e25ca775b101da3`

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