PDF malware analysis — malicious · cf41f4bbf68b4d96

MALICIOUS

PDF

89.2 KB Created: 2021-08-12 12:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: f1bd9d3488aacb34416f4870001828f7 SHA-1: 27f1c3bd0109f8c3fca817938f678ab125cc2345 SHA-256: cf41f4bbf68b4d96e6b23b0695b9fa37e7ae1d8a874d42325d9433b5b5a1605e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1055.012 Process Injection

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious or phishing content. The presence of these links and the overall structure indicate a phishing or credential harvesting attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9954

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://garglob.ru/uplcv?utm_term=cahier+de+charge+fonctionnel+en+anglais PDF link annotation
- https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/fd96417469415cf7cd3a0b1a16c8c192/gavip.pdfIn PDF document text
- http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ab27a7b17---jedurebawi.pdfIn PDF document text
- http://mramus.com/fck/imagesfile/5012878106.pdfIn PDF document text
- https://tivicom.vn/upload/files/nikidilukazugunipupemubuk.pdfIn PDF document text
- http://xn--80aamdqpfpr.xn--p1ai/upload_picture/zagekegakiwinebaxukimajuz.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/bd3knbp79q8tot3qj7q8c2oq3t/45591457103.pdfIn PDF document text
- http://actybrain-consult.com/Upload/files/tizelimobugabavamiroses.pdfIn PDF document text
- http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160cd98829af08---pisanuzixixiz.pdfIn PDF document text
- https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/29dbdd8c3fe1932c63ea4ef7ad98c5d4/gudejiviso.pdfIn PDF document text
- https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/ac021dc2989bd855fa0e085628a20484/12652056177.pdfIn PDF document text
- https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/5a7e8019f0d85cbac9ffa6eb172857ca/868095087.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/f567dc2e8dda8cf20c8185823813b0e4/xevigidibavox.pdfIn PDF document text
- https://clubforeducation.com/FCKeditor/userfiles/file/27367176730.pdfIn PDF document text
- http://noithatachau.vn/webroot/img/files/36729706290.pdfIn PDF document text
- http://wisdomtours.net/upload/file/fufijexorura.pdfIn PDF document text
- http://designerhouse.ru/upload/files/48608267514.pdfIn PDF document text
- https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/4184ed8fff2b94a0e2b29624f0738345/93927692090.pdfIn PDF document text
- http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f85f6a249---4233968566.pdfIn PDF document text
- https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/fd86068f684428c894935418c5a089ab/54216706919.pdfIn PDF document text
- http://prociweb.hu/sites/files/file/38764234680.pdfIn PDF document text
- http://xn--80aamdqpfpr.xn--p1ai/upload_picture/naxijirenufosulebapado.pdfIn PDF document text
- https://hbphoto.ca/resimler/files/turuviligiduxul.pdfIn PDF document text
- https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/eaedc7646c36ab189c8ecd1a8a042f72/vetojuvuwurovazamesimig.pdfIn PDF document text
- https://sonarmusic.hu/up_image/file/xalajijoxeso.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6f8d37686---10922579616.pdfIn PDF document text
- http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab8d7a6168---fojajuxarimifavebilafarun.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_off0000f43d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF43D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010c4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C4F	18904 bytes
SHA-256: `d407270777deb3c3a503ea82a81f2a3f3016351cef38fe927094b5aaa8abfd4e`
`font_02_sfnt_off00013beb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BEB	10784 bytes
SHA-256: `a7c01d34f64ed70dcf6136c84fa026f439b32884229d16cebe5edd2eed1652fd`

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