PDF malware analysis — malicious · 472cf7685d0190e6

MALICIOUS

PDF

82.0 KB Created: 2021-07-08 08:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: ae9d7b916f93d64ea20e4aca9f0b2848 SHA-1: 019414a0674af8bf07b26eeca43f1cdc82fd2f56 SHA-256: 472cf7685d0190e675b8395a36e7bcd547f3e30f2f353ae36e55fa758c55b5fa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to host a large number of links, potentially to manipulate search engine results or direct users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9972

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://archism.ru/uplcv?utm_term=the+crucible+act+one PDF link annotation
- https://baoholaodong24.com/userfiles/file/23846916075.pdfIn PDF document text
- https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f16c0f4a2---9195745023.pdfIn PDF document text
- https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/7366a0cec1379b2f6dfea752006650c7/tejetubitiwod.pdfIn PDF document text
- http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/720862d2f8c80cd1a57db1dc3b9e0569/73484655146.pdfIn PDF document text
- https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/9u6tg9fapu1af8olnl7t3ovcns/ragadobulojozenusodixu.pdfIn PDF document text
- http://hoadon-dientu.net/images/files/mivugisedukowenogiwoxu.pdfIn PDF document text
- https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/d521e2a7fca2f6e816ffacac9642a25b/2427482167.pdfIn PDF document text
- https://martabaktelor.com/contents//files/5418675193.pdfIn PDF document text
- https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607302c637c5d---dajufami.pdfIn PDF document text
- http://thaide.org/userfiles/file/32940417238.pdfIn PDF document text
- https://led7.ru/file/44779851608.pdfIn PDF document text
- http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078355192757---tigafupejipevumemi.pdfIn PDF document text
- http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f93a4a1be7---jijawapiwese.pdfIn PDF document text
- http://bjjiffy.com/upload/moxiwoturiwolas.pdfIn PDF document text
- https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/9a43756ef89965bf69c47f4f2fd07c71/jobot.pdfIn PDF document text
- https://www.gurgy.net/ckfinder/userfiles/files/dadotu.pdfIn PDF document text
- http://santabruna.cl/upload/file/80692208271.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdb29d91e0---vilolugakumadib.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4253d3561bd5c157961740ff488592ec/1797584404.pdfIn PDF document text
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/cruahr3sdaupf439mbf948pvg4/regodevanezalanexo.pdfIn PDF document text
- https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/f9aaea00bb252c6c3f21e2d5c5cfcea6/rizusa.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_off0000e3b6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE3B6	10360 bytes
SHA-256: `a16cf4ed92e90090757034eb2a5dc3bffa8e7925376d488802921e225b6d277b`
`font_01_sfnt_off0000fb02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB02	15716 bytes
SHA-256: `015b7b1690b1b82e391fd7b73413333c70ffd5c48bb39296b5dd75046778bbe3`
`font_02_sfnt_off0001233d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1233D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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