PDF malware analysis — malicious · 46a0f5a63cb56fd9

MALICIOUS

PDF

79.8 KB Created: 2021-06-28 01:42:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 1e3d250b4101a4776bcb8c70c82c372e SHA-1: 7a866113928c9e07b1d0bf645b2690ee1440c0bc SHA-256: 46a0f5a63cb56fd90ac489f2410c2f7c1e6e17bf0506fbebb06b389da56c811c

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to redirect users to potentially harmful content. The presence of external URIs and compromised CMS upload links points towards a phishing or malware distribution scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://oniceh.ru/uplcv?utm_term=lotto+result+sept+14+2020 PDF link annotation
- https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608e3a2ec124e---bojimemuda.pdfIn PDF document text
- http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b7aa9ad360a---34697855345.pdfIn PDF document text
- http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/rosolodubisotir.pdfIn PDF document text
- https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/7812d7fc3c50e6107ee99e9141921b5c/60369363392.pdfIn PDF document text
- http://phunggia.biz/userfiles/file/3718651389.pdfIn PDF document text
- https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/8mi4648nms42n8lor4hgblobtm/pefogesisug.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a4adc91cc6f---70753524783.pdfIn PDF document text
- https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/affc91fd6350b6faa70b9f5c2b2d8eeb/23484327754.pdfIn PDF document text
- https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/rou8122q3i8bfp5df08cpto5up/1438654504.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb20e1de826---41385297207.pdfIn PDF document text
- https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160900f9d8c0f8---8477886454.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607200ed760f3---gunuziwemadamuva.pdfIn PDF document text
- http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa174ca3254---47417373895.pdfIn PDF document text
- https://pjkconstruction.ca/images/file/minolesokuxibabivupune.pdfIn PDF document text
- http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1606d559e2fd27---refudemigufagetejopu.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9581b2fcc---70337697481.pdfIn PDF document text
- http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4fc035837---99566607943.pdfIn PDF document text
- https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/95c6a97f3f3ad6e115d8c8c85d9f06b4/sibos.pdfIn PDF document text
- http://muzycznescyzoryki.pl/userfiles/file/tovewotazupipesofexago.pdfIn PDF document text
- http://xlpe.net/Images_upload/files/13221463201.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_off0000d49a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD49A	10316 bytes
SHA-256: `c7360df469fe8dc4886ac8d313fc231369adaa8cc22d6f014a4e0696e3419b7e`
`font_01_sfnt_off0000ec23.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC23	17492 bytes
SHA-256: `5af4e7b48ec81de96c1634eba3a5dc6afbc8abfc772bbf36085647fe8256de6f`
`font_02_sfnt_off00011a56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A56	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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