PDF malware analysis — malicious · e7789864eb358c17

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 01:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 578aa0dff7e4d4abf27fd06e5a3ea447 SHA-1: cb1afbf8aeaf0d0463547bd7f9e7092a5d856dc6 SHA-256: e7789864eb358c179bb673628e158ceb116951bf2a9cc17a2320d93064985eb8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple domains, including one identified as a compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate it is likely used as a lure for phishing or to distribute further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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://hometeamcorp.com/images/usr/45385048420.pdf In PDF document text
- http://quadocdao.vn/uploads/files/20947767815.pdfIn PDF document text
- https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/68a10a18305fb5843ec4bd9beb38764e/88656878186.pdfIn PDF document text
- http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/zepefidugusekegeg.pdfIn PDF document text
- http://boekenwinkelindex.nl/images/uploads/85124181153.pdfIn PDF document text
- https://wipaphun.com/UserFiles/File/dodosuriralufadapesolaga.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/1ca836ad0c9f9d5daecddc351a28e096/28008170050.pdfIn PDF document text
- http://www.recko.ru/ckfinder/userfiles/files/92441320790.pdfIn PDF document text
- https://mt-creativestudio.com/ckfinder/userfiles/files/70799685094.pdfIn PDF document text
- http://massimoandyuethui.com/clients/69227/File/71780845363.pdfIn PDF document text
- http://fouladsazanco.com/Upload/file/57674809899.pdfIn PDF document text
- http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b7417a69f7f---jesogamularo.pdfIn PDF document text
- https://suavitinhtannha.net/upload/files/60737434856.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16125539c2ad72---38481993035.pdfIn PDF document text
- http://alpinist.store/sribati/editor/uploadfiles/tomogujoxele.pdfIn PDF document text
- https://marblobaths.com/app/webroot/img/files/76036729968.pdfIn PDF document text
- http://popnmusic.fr/userfiles/file/jasirunubijefixoluf.pdfIn PDF document text
- https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/9df43f1fd891aa486df9804ad26c9176/46516805546.pdfIn PDF document text
- https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/fafd0bdd024a441751275cbcce2228e8/lobowolij.pdfIn PDF document text
- http://dsfly.com/uploads/files/botas.pdfIn PDF document text
- https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/53d9bdebd442804ab6a8c7bfeeac1b9a/sigodenebukafum.pdfIn PDF document text
- http://cosmikkino.ru/sadm_files/sised.pdfIn PDF document text
- https://puppometalli.eu/file/bexosabelij.pdfIn PDF document text
- http://highspiritsmusic.com/ckfinder/userfiles/files/13876784260.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=microorganismos+beneficiosos+para+el+suelo+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_off0000e940.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE940	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010157.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10157	11096 bytes
SHA-256: `5b8b03dedd61a764029c145cf799157256d8afc41dac2a46e9b1b23a6f973a38`
`font_02_sfnt_off00011abf.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11ABF	18992 bytes
SHA-256: `fe9788561f11677773f11dbaa02b06abcf76b8a582f5fbe6eaab3e6db8b3eed9`

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