PDF malware analysis — malicious · 1a962cb94720e3e2

MALICIOUS

PDF

87.2 KB Created: 2021-07-07 09:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 402964a0ade29ab4901ae59b098ae07a SHA-1: b1676bd0eedf658dbb3c5ffb972af927fbfa703f SHA-256: 1a962cb94720e3e210510c05f241c0c40606bcf9b48a4c376dd901250ceb4961

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URIs and links pointing to compromised CMS upload directories, suggesting it functions as a link farm. These links likely lead to phishing sites or further malware downloads.

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 https://huntic.ru/uplcv?utm_term=newspaper+report+writing+examples+for+class+8 PDF link annotation
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f15a7cec2---wofebofeb.pdfIn PDF document text
- http://bluekeydigital.com/images/pic/file/26896897634.pdfIn PDF document text
- https://muguet.fr/sites/default/files/file/67239371577.pdfIn PDF document text
- http://renovfab-menuiserie.com/userfiles/file/sorududatizumikazabategu.pdfIn PDF document text
- http://thanuyentea.com/ckfinder/userfiles/files/49608371838.pdfIn PDF document text
- https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3d4319849816fb4bbead4bfbce99fd5e/44899423760.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/42bcbc8fc26e29bb8cff31dd75af522a/1542979921.pdfIn PDF document text
- http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b40e71d5fbc---xibujopobisezir.pdfIn PDF document text
- http://andlupa.com/userfiles/file/5750195249.pdfIn PDF document text
- http://mrmax.ca/clients/9797/File/bipudifuku.pdfIn PDF document text
- http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849801c6bee---xurax.pdfIn PDF document text
- https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/muvisekexigili.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57fc15c142---93382034981.pdfIn PDF document text
- http://www.hgbehringer.de/img/files/files/lanerenabifulikolimar.pdfIn PDF document text
- https://bojovicsirogojno.com//files/71963842878.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/05f7481e30cf1cd1b2e98d3b0fa5dba8/kukegosawopunutax.pdfIn PDF document text
- https://xn--80afc2apd5n.xn--j1amh/upload/files/xatokitimamuje.pdfIn PDF document text
- http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/nkltnai1i4dve9jeuaspricvco/53548821279.pdfIn PDF document text
- http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/5ks3h5vbr06o5q4n0brmgj1ns1/vijad.pdfIn PDF document text
- https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/af1c1cc2f1b81d49a7964232b390b42e/povanute.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd8c91866f4---kulafirigonesexobe.pdfIn PDF document text
- http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/0ebf5d7802c0055f9e21bd2946fbda59/37446669659.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609898c5ddb1f---61521556359.pdfIn PDF document text
- http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3450286b3---24388690443.pdfIn PDF document text
- http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ae3be7e2a2e33717f2419e840c7819e7/xinalubaleze.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a192580966a---71086995554.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_off0000f20d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF20D	11196 bytes
SHA-256: `ac5479a5c9f9e745a4457f18801e5b370f51c39c6776cacb5aaafdeb0fe1fa03`
`font_01_sfnt_off00010c5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C5F	16416 bytes
SHA-256: `61faab8f0f43214f11de0a5bdcbc3911305d45afac46be7f1720915c69daa369`
`font_02_sfnt_off000136ca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x136CA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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