PDF malware analysis — malicious · b9c8623b5c807951

MALICIOUS

PDF

80.5 KB Created: 2021-08-19 06:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22

MD5: 8b0b822a65b1e942a6bd5115b5c52664 SHA-1: f0f0b9ea57aff0e8989d4032eda9e2123d47e0cc SHA-256: b9c8623b5c807951e9d9eb8f4414fadd711302fb06ec983b81608b7ced3d83dd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to potentially harmful content or phishing sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9944

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://atcotourismtravel.com/userfiles/file/48311497333.pdf In PDF document text
- https://vestol.bg/files/file/poniretazaxulo.pdfIn PDF document text
- https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6ebd05d342---guvefexuju.pdfIn PDF document text
- https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/160890d500bc3b---16651679114.pdfIn PDF document text
- http://cafegreenwichvillage.com/uploads/files/41681763560.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/01baa2b89ae31fd0d95b9df3fc3e6819/10672018865.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c8e33af88---38088380248.pdfIn PDF document text
- http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/pagax.pdfIn PDF document text
- https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c790a0b593---xiwijofes.pdfIn PDF document text
- http://gpn1971.org/clients/a/a2/a25689677492d603657f1241a2a69ea8/File/5102444335.pdfIn PDF document text
- http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9bebd17b75---24147744346.pdfIn PDF document text
- https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/00212aceb21c71506058edef67d41584/vigipepoxuxeve.pdfIn PDF document text
- http://bioaec.com/userfiles/files/fiwoxegilonopodozako.pdfIn PDF document text
- http://royalwedding.jp/images/blog//file/12004831557.pdfIn PDF document text
- http://jan-fotografie.nl/upload/files/nuxuvatowukeveneke.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/f3cc68aa33aa6cefcb057bd9011d7bd7/pikotubisuvabikaladisose.pdfIn PDF document text
- http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/22203f3479774286abb571d1f402a69e/somelap.pdfIn PDF document text
- http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160726ce06f532---nitizunupuludo.pdfIn PDF document text
- https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/6kshrmevvdf7dmnclncr5us1d4/5987122074.pdfIn PDF document text
- http://dbcasagayathottam.org/assets/uploads/cms_images/files/dokabapikozurubor.pdfIn PDF document text
- https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/412c820faf300bf44ddb257ed26b1ca8/84975336203.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/493a7be861977c574f413a09a1a6afa2/75396680299.pdfIn PDF document text
- https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/a615a908c1572fc0dd82791f481f2fc0/8456387416.pdfIn PDF document text
- https://taichielite.com/louis/taichi/ckfinder/userfiles/files/69505532523.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1cbf3763c3---xuwuzunoladeva.pdfIn PDF document text
- https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b3ed2d6c21f---kafikakuvux.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+work+an+orbit+sprinkler+systemPDF 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_off0000d87e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD87E	10836 bytes
SHA-256: `0b9da3682bfadb937d77bc9e1df99cc600793ab180cf3f9c929d3886c442834c`
`font_01_sfnt_off0000f14a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF14A	16288 bytes
SHA-256: `dca189041046b6adcebdb5a4164242800b53fca370d51300a6693d2887d704e2`
`font_02_sfnt_off00011b96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B96	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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