Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80f97d9911eaad4…

MALICIOUS

PDF

81.3 KB Created: 2021-09-03 14:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a5011bf7b3c25fd8cce62ca8adfc6403 SHA-1: 55494873cb69b9be14cadf2db76e6a27b9333268 SHA-256: e80f97d9911eaad4acb7101ad16562ac252f23a1a3b81395058e5fc9cc83c741
184 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristics indicate the presence of external URIs pointing to IP addresses and compromised CMS upload storage, suggesting an attempt to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://bahtiyardishekimi.com/fckfiles/file/wominolo.pdf In PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/xabiwuvi.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/56052252339.pdfIn PDF document text
    • https://ahha.az/userfiles/file/galejevurinulokivolujit.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d40ba72ac54---befagujiso.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5b02ac636---napamitalamid.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9548b7da741a698dfbc1b2a071ac5a00/wimuzutojizejerital.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/63993064554.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/62640b5b4ed737acf0b6401e219d9343/nesarepozifozo.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/39770683301.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/84523925946.pdfIn PDF document text
    • http://carnow.jp/js/upload/files/13573672533.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae61fb8b40---66995243632.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/85702298153.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/zufof.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/73392080496.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/digofitivufovitiko.pdfIn PDF document text
    • https://coil.hk/upload/files/rifezifurinirezukadifab.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/fomubaf.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/dutunuretoboxazoza.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160b4ba7cae316---zinuxiwojaropod.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/gibimije.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ru7c2fkthe3hs80an6imnlu3ek/jaxosixegulapi.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/8a3159f33c44d647adbde7a3f70945fc/76694173165.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c114a439a8---xuxulaxabemizegudaxo.pdfPDF link annotation
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=arquitectura+de+software+modelo+vista+controlador+pdfPDF link annotation
    • 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_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE4 11160 bytes
SHA-256: f14cc262bbf6b2f75e2a1bdf4baeddbccf880558b3326a17b8926a6428d24632
font_02_sfnt_off000108d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D6 18680 bytes
SHA-256: ed94104bdaa787fa3e1d792a7521cd27088bad0b1bcf97f5bf1c50888dde43b7

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