PDF malware analysis — malicious · bea809f614775545

MALICIOUS

PDF

82.1 KB Created: 2021-09-03 09:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 862591a3a91e12d363ec32188ac2e3b9 SHA-1: 00688485676d02e9d2d7e25df912d16d3bf5a90e SHA-256: bea809f61477554579ccc88f10e823dfb3c1eb3efc5a23ac099643fab34d7498

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristic analysis indicates the document functions as a link farm, directing users to multiple compromised WordPress sites and other disposable hosting domains. These links likely serve as a lure to distribute further malicious content or conduct phishing attacks.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://drafthe.ru/uplcv?utm_term=shogunate+japan+worksheets PDF link annotation
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/nboqqe0kil6h09afp1fqdacjmt/gunolibudoja.pdfIn PDF document text
- https://ms02bet.com/contents//files/76497662829.pdfIn PDF document text
- http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1ecb39c2cf---luretenuzogofefodib.pdfIn PDF document text
- http://whalesart.com/uploadfile/file///2021052002580666.pdfIn PDF document text
- http://hevolta.com/upload/file/gisunokudediparegakif.pdfIn PDF document text
- http://astmasme.com/userData/board/file/74638513251.pdfIn PDF document text
- http://galsabino.it/userfiles/files/90921347354.pdfIn PDF document text
- https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/dvgdivobgl5na27p9hgc9srv2l/ligepidaxi.pdfIn PDF document text
- https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16089d81c50f79---24970552422.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/m0idrhf1bg8hod9ecbgtajmmuq/13915654043.pdfIn PDF document text
- https://polandpools.com/contents//files/naripadipujiso.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/4832740148.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/79029906641.pdfIn PDF document text
- http://liccuza.ro/stiri_files/file/23342874902.pdfIn PDF document text
- https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071d8b97e7cb---lajif.pdfIn PDF document text
- https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/8870125417c2acd8009d0a70b804eb7d/lezil.pdfIn PDF document text
- http://doktor-okonski.pl/uploadimg/file/nupop.pdfIn PDF document text
- https://norservis.com/files/files/62151582904.pdfIn PDF document text
- https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160801566b469b---44447744958.pdfIn PDF document text
- https://curryleafharleysvillepa.com/hang/userfiles/files/90246264060.pdfIn PDF document text
- http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/50844867056.pdfIn PDF document text
- https://ihotel2b.com/upfiles/editor/files/42705849424.pdfIn PDF document text
- https://karapinarinsaat.net/userfiles/upload/file/30926885044.pdfIn PDF document text
- http://studioferrato.it/userfiles/files/sajodufumelejipuro.pdfIn PDF document text
- http://nousgarage.com/userfiles/file/45678332552.pdfIn PDF document text
- http://primethailand.com/ckfinder/userfiles/files/walokevi.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_off0000daad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDAAD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f2c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF2C4	10876 bytes
SHA-256: `9ec750709436e4e84d6ad914221bd4c9d669a8ec75180cedc06600fb8ecf70bf`
`font_02_sfnt_off00010bfa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BFA	17876 bytes
SHA-256: `671d4b6519c61e9c634196382930e059a2b6d2b2c56f114559b0bf86bff8d8f6`

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