PDF malware analysis — malicious · 09cebe2d4e53fba5

MALICIOUS

PDF

89.2 KB Created: 2021-06-28 06:56:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: 8c61ae92487394e9130bd60246535b3b SHA-1: 56e2bb6e56aa44017b087209e7230fd6b6759e1c SHA-256: 09cebe2d4e53fba5474282918d23c436d0b6d35f30d70a6262e3be8bb90b46f8

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and other disposable hosting. The presence of a 'download button' lure further suggests an attempt to trick users into interacting with malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 7

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.
Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON

Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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://laborke.ru/uplcv?utm_term=how+to+make+numbering+start+on+page+3 PDF link annotation
- https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bea788a00---bifepuvetufuneredilirawez.pdfIn PDF document text
- https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/6macfv6rgmesf237gtumauirm1/35825571549.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160768a818c70e---jumirigom.pdfIn PDF document text
- https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160985b0a6a6f7---renizuzibudebemakaxoxago.pdfIn PDF document text
- http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45705464927.pdfIn PDF document text
- http://amandamaitland.com/images/file/wekafefiponina.pdfIn PDF document text
- https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c2d5cd408e2844a074d0018dadbf3443/buginisajibetit.pdfIn PDF document text
- https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/uh7ht1d17ehrhq1qft5du8bthp/pepurevogugi.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2fd414218b1260d0eeecc4c842d5ffec/34495542199.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5ed36ac55---65423028525.pdfIn PDF document text
- https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b38fc37f7bb---3384624595.pdfIn PDF document text
- https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c84d0acbf9b---5566467255.pdfIn PDF document text
- https://keluargamimpi2.com/contents//files/76796968000.pdfIn PDF document text
- https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/95ea19920fe89790f6a6da1c8f01500f/rezuduzilixizoxabatokon.pdfIn PDF document text
- http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a47573393---malel.pdfIn PDF document text
- http://yuhenganquan.com/userfiles/file/20210624200810_2141197839.pdfIn PDF document text
- http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc06d7ef50b---84997292261.pdfIn PDF document text
- http://visit-pune.com/userfiles/file/remikajofixexoma.pdfIn PDF document text
- https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/79a2a44ad5a5647b65a3004355a9e685/lelovetiwasopip.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609e47659d321---68753185838.pdfIn PDF document text
- https://haltia.mx/sii/ckfinder/userfiles/files/selefuvitapuru.pdfIn PDF document text
- http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a86e94c089b---zokemeliteleniku.pdfIn PDF document text
- https://capital-tic.com/upload/ckfinder_temp/files/20210529010117.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ac442040085---24884196769.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084bf6038dfa---majoz.pdfIn PDF document text
- http://alliusie.com/userfiles/file/xifopewikiberanumekez.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_off0000f682.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF682	17276 bytes
SHA-256: `735358d2637dc060e87dd9df0dfdd46a5f94558cc502db4d5ae2b7a6bccac5db`
`font_01_sfnt_off000123c7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x123C7	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013bde.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13BDE	11128 bytes
SHA-256: `a93dde7eba5043630b801680b94fa2d98cca9cdb74ccc82b764a1c3975802f89`

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