PDF malware analysis — malicious · e15113e7f0d76cd8

MALICIOUS

PDF

88.9 KB Created: 2021-07-01 00:22:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05

MD5: b9ad2e896f0c88939ef1918d4d778f52 SHA-1: 75d8f413d32d65a943e8a1bf1f3b76c4cebb6001 SHA-256: e15113e7f0d76cd8a495331e1f709f1e3eaeeb3a1b3faa4d92acefbe6107557e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://crewmak.ru/uplcv?utm_term=meaning+of+normocytic+normochromic PDF link annotation
- https://kamarkosong.com/contents//files/deweluvukoxiwomese.pdfIn PDF document text
- https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160872297dfcca---72446278573.pdfIn PDF document text
- https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/1b4ace409766eb814c2c2db9af8f4f2b/13223138229.pdfIn PDF document text
- http://chocoenglish.com/_UploadFile/Images/file/nomukotasodajus.pdfIn PDF document text
- http://caf-ljubljana.si/docs/48006407868.pdfIn PDF document text
- http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0bdcd7ec8---sejiso.pdfIn PDF document text
- https://jnfarley.com/wp-content/plugins/super-forms/uploads/php/files/rl2kd3t9c2qe7vh9td48o7dto1/datanofiberepanunej.pdfIn PDF document text
- https://livredart.com/ckfinder/userfiles/files/pataroxizenutu.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/7uhsf3c5t5asajtevo97rtekpc/15921213655.pdfIn PDF document text
- https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c414faa4f20---82590702293.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b835f14b38a---vepatarujebijolutorudakag.pdfIn PDF document text
- http://crm333.com/documentos/file/resulofukuzuxem.pdfIn PDF document text
- https://goodline.by/userfiles/file/watusodagifa.pdfIn PDF document text
- http://cogersquest.com/clients/f/f6/f6194b381802d71b6842d6160e8859b1/File/kugudowo.pdfIn PDF document text
- http://www.logomarcanet.com/userfiles/file/sowiveromoniwozibuguxugux.pdfIn PDF document text
- https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/alv562ql498ql0vspjidbl01ga/puxefesazafemitukisikura.pdfIn PDF document text
- https://amatnieks.com/pictures/image/79711254405.pdfIn PDF document text
- https://syntellect.ru/Repository/file/77741103754.pdfIn PDF document text
- https://dm288.com/slicice/file/54354675784.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a854236fd79---86920474558.pdfIn PDF document text
- https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/4agr1uke0j1ur0vsbskv0ocj5g/56283260034.pdfIn PDF document text
- https://fertilizerproductionprocess.com/d/files/65971983181.pdfIn PDF document text
- https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/dab1d74a2f13824dc83ac24a0bcb833a/lopupabanitebuzonajam.pdfIn PDF document text
- http://nousgarage.com/userfiles/file/25377300192.pdfIn PDF document text
- https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/p02rte4qsjop2v7ejad0s66c2j/vojesu.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1606fda0eacf31---pemekaroja.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_off0000f82e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF82E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00011045.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11045	10676 bytes
SHA-256: `03cf7a23bb57eb586789632515b35ef8bd7a36db5e22522b7f68665767c4c955`
`font_02_sfnt_off00012894.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12894	17284 bytes
SHA-256: `a20653f0cec09cbb26b48c9b5477f5b37668eb820d0efc87b589e8d0aa2b4b90`

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