PDF malware analysis — malicious · e096299e8fac548b

MALICIOUS

PDF

83.0 KB Created: 2021-07-02 19:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: d46871ea03ba78d680d62074cf181a8c SHA-1: 7939b0ce58af4d732ab2b8abcf19a1a47aa25970 SHA-256: e096299e8fac548b0516ca68f7fde8a8fa5ab49ddeec44cfcb30c11815b019e6

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics reveal that the document functions as a link farm, directing users to multiple distinct hosts, many of which are associated with compromised CMS uploads or disposable hosting. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

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://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/razimatunu.pdf In PDF document text
- https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/5b4b9e76e0434b54b4d623b243b98856/85095991548.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/566k9r1s69eu0ucavaur959k00/wozabuvilikizemesen.pdfIn PDF document text
- http://nsdadventist.org/FCKData/file/19394238837.pdfIn PDF document text
- http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5c889b4e1---nugilogeganu.pdfIn PDF document text
- http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0dacd6819---dozesujokilimujur.pdfIn PDF document text
- http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786e28737ff---10517640942.pdfIn PDF document text
- https://aronabritcan.com/userfiles/file/22507461309.pdfIn PDF document text
- http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5dbf1aa5f---gufejimanuvazolivijexovox.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160de695b6470a---22654414794.pdfIn PDF document text
- https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/s63etgmc6jjvvom6bi2cpaf054/61245892206.pdfIn PDF document text
- https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/fut3nkql1pftntq5l4m4eb4me1/tesumexu.pdfIn PDF document text
- http://www.sport-konyv.hu/userfiles/file/zosufegekoxawowokulapa.pdfIn PDF document text
- http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/a1628062350fe6fbc4fca32d1486c86a/66154965963.pdfIn PDF document text
- http://simonide.org/userfiles/file/wezoxi.pdfIn PDF document text
- http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c27035b10---bufedo.pdfIn PDF document text
- https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/a8d4bca8bd0d82dedb3f07ebc5f275a8/73203718216.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/bfd5a04ed57ff018a3b063c823b7a7fe/nirerisebutonaju.pdfIn PDF document text
- https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/e3b608c3e2b50822c7dcbbc91ae20764/43674285792.pdfIn PDF document text
- https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/82b1dfe22ecc280719774d54a98e56c7/35451176154.pdfIn PDF document text
- http://kiemtoanhaiphong.vn/upload/files/duwejifedefit.pdfIn PDF document text
- https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/5a1971558af72a53479d3396dccc5cdf/guxurute.pdfIn PDF document text
- http://minhanh.com/files/vikaweba.pdfIn PDF document text
- http://burchiellati.com/file_fck/file/69728121495.pdfIn PDF document text
- http://weddingceremoniesbybev.com/clients/72651/File/22979075299.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160af828b3c7f7---senugugosa.pdfIn PDF document text
- https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/82915185932.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=system+analysis+and+design+in+a+changing+world+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_off0000e05e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE05E	16724 bytes
SHA-256: `ea4a6c30d72922420f82cf5865cedcff8826bd06bc1fc8cacda03bc3bd236c12`
`font_01_sfnt_off00010bf4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BF4	11340 bytes
SHA-256: `22990c09f752e21fc1ecd9dc0fe5ac5ec0cb9dc316bc49d8dd90ef35c4e4311d`
`font_02_sfnt_off00012647.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12647	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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