PDF malware analysis — malicious · 347dd8b300ad65bc

MALICIOUS

PDF

83.9 KB Created: 2021-09-05 10:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: a7f198920d139abcd8350901e3779936 SHA-1: 1839c00e1520a407678f871ef1582070f2969ffe SHA-256: 347dd8b300ad65bcd2dffdad6af1767fd719756cd6760b6baf9683fc7bd11722

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing or malicious redirection scheme, likely delivered as a spearphishing attachment.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/q3ng3uv5aj462kh6d3urie7685/92752738224.pdf In PDF document text
- http://premiercontractinginc.com/files/file/42591990539.pdfIn PDF document text
- https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609dce0e10a1d---9215747961.pdfIn PDF document text
- http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad41b29ff7e---16607484339.pdfIn PDF document text
- http://refinerlink.com/userfiles/file/78360473315.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32154d5f6a---94896900259.pdfIn PDF document text
- http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc465020a4---ximosa.pdfIn PDF document text
- https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/45113b79e133b90141434d9fd64b912f/29573414562.pdfIn PDF document text
- http://lifecare4all.com/upload/files/60179396688.pdfIn PDF document text
- http://opgzvh.hr/upload/file/repazusozopuxo.pdfIn PDF document text
- https://boucherienabli.com/uploads/FCK_files/file/wutulaxizegematupudazizin.pdfIn PDF document text
- https://cochleartudaskozpont.hu/files/zixudokemivaziwilatole.pdfIn PDF document text
- https://alarrabnews.com/images/content/content/file/nawuperufelivukinojur.pdfIn PDF document text
- https://pametnidom.hr/pametne_kuce/userfiles/file/18616440561.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/7j46rj9g0kc28n7j29e9ug2co7/xikizixedalupabosufeluti.pdfIn PDF document text
- http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/h2tucsqhtgh1khrinl5lr1vje3/86047996383.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf9e749f6b---55837540410.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f25372da15---429703180.pdfIn PDF document text
- http://minutemen-jrotc.com/clients/84940/File/13215501833.pdfIn PDF document text
- http://donaldnathanlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kunenu.pdfIn PDF document text
- https://ikitellirezistans.com/upload/files/tajujupixokawimawupefano.pdfIn PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/868bblbjn5vfirk9ro8mes9s3a/gokivofigalunuwijut.pdfIn PDF document text
- https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/64c6793bea82315938efd17f7e2f682f/kirusobatututodamotokol.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1610d1370d03c0---bulodexapovozufawagugeke.pdfIn PDF document text
- http://ankamet.com/userfiles/file/24383261647.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=evolis+zenius+classic+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_off0000e052.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE052	18704 bytes
SHA-256: `f56d22c0ab757261f26ef66f8209f979d13403bafa98ed0ae9c658455b68f739`
`font_01_sfnt_off00011141.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11141	10624 bytes
SHA-256: `c67a7d590eab0a1003aca537bba771602756f1f2af48738ac5458460b8bb06c9`
`font_02_sfnt_off000129b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129B4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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