PDF malware analysis — malicious · 6fd82b08fa69d889

MALICIOUS

PDF

103.2 KB Created: 2021-08-25 18:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 0d7ba98e3b429ce7e30fc8e9a59ccaf1 SHA-1: 1ffe084909bc956cff6f1e98e63607144900e852 SHA-256: 6fd82b08fa69d889b9175a5298276b2d277b2f90078b85abff95ec5e83f21248

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many hosted on disposable domains or compromised CMS upload directories. This indicates a link farm designed to redirect users to potentially malicious sites, likely for phishing or malware delivery. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9931

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://naturallabs.fr/userfiles/file/69321079673.pdf In PDF document text
- http://gojjang.com/uploads/files/82365020085.pdfIn PDF document text
- http://sns.hu/_user/file/zivuzusefosebosok.pdfIn PDF document text
- http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9faa27947---xufubirefozinuge.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c444f8931d---movinefodafenasaxexe.pdfIn PDF document text
- http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc8d84dc8---79335827268.pdfIn PDF document text
- http://www.stsmcc.org/www/js/ckfinder/userfiles/files/dugixufuweg.pdfIn PDF document text
- http://sporteambiente.it/ckfinder/userfiles/files/50718279503.pdfIn PDF document text
- http://miamiokclassof65.com/clients/d/db/dbefc63a503cf3d3a4f9fb61678ecc08/File/kuziwamolalalojosarawive.pdfIn PDF document text
- https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/e5477vt64jva8dpsin45mjeil5/53559158503.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/j4ppmjaoos8nd1t9iqbmlvg5iu/33195550897.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/2bd707619a4fd7be702180f5f8ab0c73/rewawumokewemo.pdfIn PDF document text
- http://fred-robin.com/ckfinder/userfiles/files/3095714288.pdfIn PDF document text
- http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731e846193f---laxejimomakuji.pdfIn PDF document text
- https://airflow-skateboards.com/upload/file/xivibusugis.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607533691768f---2270396551.pdfIn PDF document text
- https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1106529b0---zibin.pdfIn PDF document text
- http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/sepawak.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/9a2275f95b6ff366d293129e95e025a9/7903422964.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/8lg5lgamvjk75nufvrqq00eutv/judizazazige.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf37d732ce---3733436196.pdfIn PDF document text
- http://sintellect.ru/Repository/file/58803791992.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/33o30073akrounu9mpnj58r09j/negexazozekigof.pdfIn PDF document text
- http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/batajosabuwisasan.pdfIn PDF document text
- https://nepalimodelagency.com/userfiles/file/kagosipaf.pdfIn PDF document text
- https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/7b831fac1308fb4261d94e4671e51c96/53885863436.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gk+question+and+answer+kannadaPDF 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_off00012d5d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D5D	18660 bytes
SHA-256: `cd88c24c805cb961218d84776c64d8aef0e49d42f4320143ca99a19ba042a0d5`
`font_01_sfnt_off00015ddb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15DDB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000175f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x175F2	10660 bytes
SHA-256: `366b480e44f56327e62096e694abacc2f870d2fcf65742ef10214b39049005cf`

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