Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fef4a097f9af23e…

MALICIOUS

PDF

81.6 KB Created: 2021-09-16 10:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ee0309904a41513ebdc94515c0270138 SHA-1: 3a29303172ffb8525ed6cf99b5332dcd48e99829 SHA-256: 1fef4a097f9af23e17db40588400f58b6d38081c0f09006e80204d346c562ee9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document that exhibits characteristics of a phishing lure, specifically presenting a fake CAPTCHA to deceive the user. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://medvor.ru/uplcv?utm_term=fifa+street+4+apk PDF link annotation
    • http://accapierre.it/userfiles/files/99582603010.pdfIn PDF document text
    • https://suncables.co/images/file/pobukobepegokibimovidun.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/sukase.pdfIn PDF document text
    • http://stadtbild-intervention.de/Quansis/ckfinder/userfiles/files/45306721900.pdfIn PDF document text
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/4476a96fc85e0f59e8ba7b7b7949db18/kevobim.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/wiwabadifamanugek.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/76554940354.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/161419c7964094---vivuxizokejewomixo.pdfIn PDF document text
    • http://terredellamagnagrecia.com/userfiles/files/fexozelopax.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///nalijakotifepulaba.pdfIn PDF document text
    • http://prompol.com/media/file/xafibutegupa.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613534f87e15a---nozek.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d64d9a03---befufew.pdfIn PDF document text
    • http://hflbdq.com/uploads/file/080116133619.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/tidixunaxevak.pdfIn PDF document text
    • https://smwebtechnology.com/arishayurveda.com/userfiles/file/74326722705.pdfIn PDF document text
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/46790435798.pdfIn PDF document text
    • https://thepainter.asia/upload/files/nuxujabatujezujagonibenu.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/23cf36f557d59829e5612ae8c3dfb620/menezifojelal.pdfIn PDF document text
    • http://pinxedien.net/upload/files/34366345392.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/xebekobozimesesitosubomi.pdfIn PDF document text
    • https://kaparatt.com/images/File/78355950579.pdfIn PDF document text
    • http://heatexchangersolution.com/upload_fck/file/2021-9-8/20210908060605800464.pdfIn PDF document text
    • http://the100voicesofgospel.ch/fichiers/newsletter/file/gabivu.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/16141643672.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ddc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDC0 17132 bytes
SHA-256: edd3436364b6529a1242ae35012224489f4751edaa8caee3e636879473b5ce1c
font_01_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 10228 bytes
SHA-256: 8073a3945b429689be01f3ea0ba7c0ec6b5e34726d0e1c05bc9c1b451008b271
font_02_sfnt_off00012132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12132 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.