Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b6d40690e2ce14…

MALICIOUS

PDF

90.3 KB Created: 2022-04-04 14:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-06
MD5: faf4c753d2a542b8364550437f226414 SHA-1: 16bd2572e7b90742aa7caf6f6b9c8a9367f0d91c SHA-256: a8b6d40690e2ce14e73999961691d0222230820f5d4af706b9ef69d4fb749c1b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links pointing to various domains, many of which appear to be disposable or low-reputation. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these linked resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://loheb.co.za/YmrXLWy8?keyword=char%20broil%20infrared%20grills%20on%20sale PDF link annotation
    • https://placute-frana-dispaco.dispaco.ro/userfiles/file/zisomad.pdfIn PDF document text
    • https://nffcd.org/userfiles/files/maruzugorawibij.pdfIn PDF document text
    • https://xuxufagitagagi.weebly.com/uploads/1/3/0/7/130740521/5270569.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16231557f7aa41---32841570062.pdfIn PDF document text
    • http://bluebirdcanada.com/FileData/ckfinder/files/20220221_862D9CDB0074304B.pdfIn PDF document text
    • https://rebanurox.weebly.com/uploads/1/3/4/4/134490941/fa686bda.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/tasepedagewebenavego.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/0667ec7a2730eb5cd7c1a7e8d12142d3/tuzosasalidodukuvun.pdfIn PDF document text
    • http://holflorstudio1.cz/upload/files/tusivewumo.pdfIn PDF document text
    • https://kevanosum.weebly.com/uploads/1/3/0/9/130968994/3782339.pdfIn PDF document text
    • https://zuveravovizopow.weebly.com/uploads/1/3/0/9/130969477/jobewuvojufi.pdfIn PDF document text
    • https://fifimijo.weebly.com/uploads/1/3/4/7/134748793/kubemaxu-gekobapatavisa-resutapeb-xugowilokafobo.pdfIn PDF document text
    • http://ulibka.edusite47.ru/files/files/mudufesun.pdfIn PDF document text
    • https://sejaworobe.weebly.com/uploads/1/3/4/8/134865602/vadowunuwapemo_medusof_sidezon_roliwiliz.pdfIn PDF document text
    • https://tewonubipudi.weebly.com/uploads/1/3/6/0/136016370/6a39f03611.pdfIn PDF document text
    • https://xororowikaluna.weebly.com/uploads/1/3/4/6/134643421/mutuwudolefaro_zifezagofafuram.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/buwitifef.pdfIn PDF document text
    • https://aspirans.snoskainfo.ru/files/file/90919152257.pdfIn PDF document text
    • http://aleksey-mihalchik.ru/upload/files/foderisotexotesusaf.pdfIn PDF document text
    • https://majuzifulanapu.weebly.com/uploads/1/3/4/8/134887757/lakiwatu.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/ae6dd9f.pdfIn PDF document text
    • https://szabolcsipeter.com/userfiles/file/safabex.pdfIn PDF document text
    • https://csam-villepinte.org/uploads/images/file/vevet.pdfIn PDF document text
    • https://xeforosoxipu.weebly.com/uploads/1/3/4/9/134900432/7201565.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 extracted file (font_00_sfnt_off0000fb7e.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0000fb7e.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB7E 17964 bytes
SHA-256: 8be66d199f5623d576d02953e27a39ed0968d1819d20d8aac85d86b58880fd7c
font_01_sfnt_off00012afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFA 10708 bytes
SHA-256: 94269c8ac63839935f5381e1a7b4656982d46f9960a5993e15280e5a62d1a4f2
font_02_sfnt_off00014338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14338 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1