PDF malware analysis — malicious · 9bf550362387ada4

MALICIOUS

PDF

74.0 KB Created: 2021-08-31 22:22:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 5b12daf61c4b63f656000a2efc508927 SHA-1: edd042f9f30ae56cf6b5a136aae0117d40e549ed SHA-256: 9bf550362387ada480b1c12fc1e16318ea0645334b295d68e7e428418ba80678

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of these links indicates an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

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=care+after+vaccination+for+babies PDF link annotation
- https://sanidom.pl/img/file/45553878808.pdfIn PDF document text
- http://erex.hu/upload/file/vojurabibufufek.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0f297ddcd---fenimibavuvavi.pdfIn PDF document text
- http://cpils.com/userfiles/file/jofawisuwemududilem.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/df54fd2c2b93b4f279b2f1844babe1a1/xijebin.pdfIn PDF document text
- https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/t3k92er8tdljgs7ut94a2erdj8/10580443444.pdfIn PDF document text
- http://drironcat.com/images/file/3587169731.pdfIn PDF document text
- https://progin.swiss/ckfinder/userfiles/files/84071065429.pdfIn PDF document text
- http://domuran.pl/files/file/7556933560.pdfIn PDF document text
- http://snap-drone.com/userfiles/file/35335354233.pdfIn PDF document text
- http://liebherr-tr.com/userfiles/file/kesupipidaxoredis.pdfIn PDF document text
- http://voyagevietnamlaos.com/hinhanh/file/49963048767.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/3d246bcda6c901d31037c41db3a859d2/48372448778.pdfIn PDF document text
- https://wcfkenzi.com/ckfinder/userfiles/files/nigerazewodano.pdfIn PDF document text
- http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/popidigubagibunebigogas.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e238947fc---6395329461.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c86322c276---zuzamekosidorokabodufesa.pdfIn PDF document text
- https://aradovan.com/userfiles/file/butoxo.pdfIn PDF document text
- https://bajrahrs.com/userfiles/file/bitowejilasezobixugubipo.pdfIn PDF document text
- https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/4pgu7tt51e6ff1hjpntoj9opc3/58215807518.pdfIn PDF document text
- http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/75860cfd2ccdd49e1095fc0d0de7ddae/pefavokimajamewu.pdfIn PDF document text
- https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/27cb018b70cb6d956e00866ff7c5056c/xilirelaberadaba.pdfIn PDF document text
- https://3eyamaichi.com/upload/ckfinder_temp/files/20210731025218.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_off0000c142.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC142	15764 bytes
SHA-256: `532a66736f6258cba0a095e8aaff2ccc2399269695edad4d52c2fb239a3e6b5a`
`font_01_sfnt_off0000e8d5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8D5	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000100ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100EC	10520 bytes
SHA-256: `2cc4849725dcdc3bbfb1a4fe42fb41c1a45c982cb9af66c7f27d775162a1624e`

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