PDF malware analysis — malicious · 0ff486ab7a74ea50

MALICIOUS

PDF

96.5 KB Created: 2021-06-27 09:10:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e761586250c020cb62577785159943de SHA-1: beb2d5e9019c75bc852f118fc99939e0cdefde38 SHA-256: 0ff486ab7a74ea501bbe4a1f9553682240627571628ae27ec4db843a9fa8f0b2

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content. The presence of multiple external URIs and link farms indicates a phishing or malware distribution attempt.

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://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609867f98a49e---buwevikexaduzenetibijuwo.pdf In PDF document text
- http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/60d8cc338249dd6dd1bfb5cf375295b9/vagosapizixusiginamumezu.pdfIn PDF document text
- http://alexhofford.com/temp/files/file/59864219230.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b42c08b0b---27196394644.pdfIn PDF document text
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606e765b9078f---19479878519.pdfIn PDF document text
- http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96c56ec761---tugobumulufikijaguse.pdfIn PDF document text
- https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/39321ba367384e17b3f39afbb6d7e6a4/68953508665.pdfIn PDF document text
- http://iaestedresden.de/userfiles/file/62910820739.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8402e3037---41797800583.pdfIn PDF document text
- https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8414a695d---sotixof.pdfIn PDF document text
- http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c48a364b1e2---82715877533.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a8dba2608cd0af14ec74619a9f81be7a/96419235328.pdfIn PDF document text
- http://akcjonariusz.com/UserFiles/file/dokadekagazadafulinogij.pdfIn PDF document text
- http://sosnovgeo.ru/userfiles/file/zeroxizu.pdfIn PDF document text
- http://gdlianyu.com/uploadfiles/file/rebivafukajosunixigudanur.pdfIn PDF document text
- https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070334aa56c8---xularukorivovodak.pdfIn PDF document text
- http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16098a28638b02---wikigo.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/a2d26f36e0a254b715cb396e744d620f/50309632437.pdfIn PDF document text
- http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070463ebe8ff---masuzazowexojoboxudes.pdfIn PDF document text
- https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34ff92d83d---kowotezixodenewevodufe.pdfIn PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/02a28ed4af961099c815da6ebca4ba2b/57925665572.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/2af57e380e38bd80bbee7a81ffdfa158/dexanitanirixa.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d548d28897---94404900859.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/63252b4f124e040f758d9e3b10387352/50742577686.pdfIn PDF document text
- http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083261784a44---pavoxez.pdfIn PDF document text
- https://weddingitaly.jp/images/file/libajepivoso.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=finishers+anointing+scripturePDF 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_off0001150f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1150F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012d26.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D26	10684 bytes
SHA-256: `0600538bdd308f7184eb309da0664b55c67b6194379e5d06c9b5d3bc6c06437e`
`font_02_sfnt_off00014597.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14597	17380 bytes
SHA-256: `50328a588179efbbd27b67406f32c1a34b55532c05f92a7db4f3d565a70040bb`

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