Malicious PDF — malware analysis report

Static analysis result for SHA-256 4459e3e0d9efa2d8…

MALICIOUS

PDF

75.8 KB Created: 2022-04-16 18:40:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 257efec549599588bb9f77bd1e628008 SHA-1: efb73884ec66dbebcfdb1b452c5c7aad1dd1c2d4 SHA-256: 4459e3e0d9efa2d82564f6555cbf14a5cc176244ce17e9c43da1633cc71671aa
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains a large number of external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The embedded content is heavily obfuscated, but the overall structure and heuristic firings indicate a malicious intent to lead users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • 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://fecuq.co.za/YmrXLWy8?keyword=what%20causes%20a%20person%20to%20have%20no%20conscience PDF link annotation
    • https://komimarokobak.weebly.com/uploads/1/3/4/6/134604519/mesobo.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/86705353844.pdfIn PDF document text
    • https://vobobesi.weebly.com/uploads/1/3/4/7/134702984/e3bdce59.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/kofif-kitetuxe-paxutevina.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16220124c73f20---23558428263.pdfIn PDF document text
    • https://juluvolalo.weebly.com/uploads/1/3/4/4/134435755/nazegap-kobuworajuxewa.pdfIn PDF document text
    • https://dafemiperufukoz.weebly.com/uploads/1/3/1/3/131379503/4236431.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/54072813051.pdfIn PDF document text
    • https://gijakumode.weebly.com/uploads/1/3/4/3/134306186/5728148.pdfIn PDF document text
    • http://zxsolar.com/d/files/detisanesoraxutime.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/m604gtp64j447vgidhpi1d3161/20337688816.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/d451d.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/xipudizarizewonasofir.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/57485657815.pdfIn PDF document text
    • https://terusabul.weebly.com/uploads/1/3/4/7/134702655/jixafobizapiz.pdfIn PDF document text
    • http://travelsolutions.co/ckeditor/kcfinder/upload/files/fomavojuwef.pdfIn PDF document text
    • https://nifakisafuzum.weebly.com/uploads/1/3/0/7/130775286/cd8eb3e0ef1b1.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/6d3dfbd79eaf4dfab046816b98e8b073/92788903492.pdfIn PDF document text
    • http://qamsar.org/userfiles/files/61425587139.pdfIn PDF document text
    • https://pafodezeba.weebly.com/uploads/1/3/4/5/134589846/fominolor-gezusugujebu-pakevagawo-wevarujabu.pdfIn PDF document text
    • https://alyosserspneed.com/userfiles/files/pubexagajanejegikuser.pdfIn PDF document text
    • https://simixoko.weebly.com/uploads/1/3/4/8/134867908/53174.pdfIn PDF document text
    • https://gapeduruje.weebly.com/uploads/1/3/2/6/132681343/195566b275038b.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.

FilenameKindSourceSize
font_00_sfnt_off0000c4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F4 16852 bytes
SHA-256: a068553c3c56a8bd6a08f229c3b986b30aa3251992f85aff3e25c0a8926749df
font_01_sfnt_off0000f102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF102 10584 bytes
SHA-256: bb66d51e45e4e82206b28b1c24081dd49b52efd4d55d0d79da4c8c99d879626c
font_02_sfnt_off00010934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10934 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1