PDF malware analysis — malicious · 874cbecaf0eeaf7f

MALICIOUS

PDF

87.8 KB Created: 2021-06-30 00:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 84e774f883e57d8cc3b411a91f968d9a SHA-1: b79c2639f7a3f5c58395970ea89c2e552643b4cc SHA-256: 874cbecaf0eeaf7f8d571bdd1cf40974604f96478024fe2d66afeccd1e317f37

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The primary purpose appears to be redirecting users to potentially malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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 http://abwessex.com/uploads/files/nokob.pdf In PDF document text
- https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/386dbeb87babdb38873af9318f7a77c0/pisesu.pdfIn PDF document text
- https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f08cb8b46---fuzijetunuja.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/388609d132a92ab134f73c0bfa431a0e/21604195998.pdfIn PDF document text
- https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd2833f844---4402948201.pdfIn PDF document text
- http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb8a7edb4d6---71304738269.pdfIn PDF document text
- http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942c780b446---sinifikomeribelazawafadi.pdfIn PDF document text
- http://transinfosoft.com/userfiles/file/57986497246.pdfIn PDF document text
- https://gretajensen.com/ckfinder/userfiles/files/nimofujegenaxitaxila.pdfIn PDF document text
- https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/6cb85a089013de03207f5945fffaa511/vufipumusu.pdfIn PDF document text
- https://vokalensemble-vocembalo.ch/userfiles/file/35291606856.pdfIn PDF document text
- https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/2aae972dc612b48371764226ec17c1bf/43275046341.pdfIn PDF document text
- https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/1c3df337bb1c43f5138fca00ccad6dab/74312399807.pdfIn PDF document text
- http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/12396995364.pdfIn PDF document text
- http://yokohama-model.com/userfiles/files/14225589688.pdfIn PDF document text
- https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768c1a62b93---pojarunetabaluziximalex.pdfIn PDF document text
- http://bakoca.hu/files/file/manitojerizudul.pdfIn PDF document text
- https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/b50575b0cdad734085ec12f66c0e7c52/86679264702.pdfIn PDF document text
- https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/6780d1a5430daa0a4565a6474eed1dd9/62488888619.pdfIn PDF document text
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/824ab8a77490b0171b9f38d37575aa23/texabawufutibufululuruwef.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d3a4ed9bc---femujubebumox.pdfIn PDF document text
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/d325b6c70dfeebd521ed59e0ff1250cc/67635134524.pdfIn PDF document text
- http://www.advokat.com/app/webroot/img/fck/file/26691007230.pdfIn PDF document text
- http://thebranchoflife.org/clients/3/37/37a84c4c47f147f839b5d5a44bb1b86c/File/lunonobetixaloru.pdfIn PDF document text
- http://aucoindeshalles.com/menu/file/pujukuzol.pdfIn PDF document text
- https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/8hb9f3cg97115ic1tohaiiemm6/9142679418.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=new+drawing+sketchPDF 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_off0000f32c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF32C	10640 bytes
SHA-256: `2352dd591d6111d7d600d67d1eafa0ad54272e018c96a6031e1fdf02dc60d2a3`
`font_01_sfnt_off00010b4f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B4F	17300 bytes
SHA-256: `ca5731d7798f37d7d28ceffecabca337f3af82a2e6c64ab2bb4377700dd08dda`
`font_02_sfnt_off00013895.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13895	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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