Malicious PDF — malware analysis report

Static analysis result for SHA-256 611d99d1776afeaa…

MALICIOUS

PDF

82.3 KB Created: 2021-09-19 02:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a918984c7147f8b93874a2ea8c37e53 SHA-1: 7489eefd68886ca657a5ad3aa17f789a02963d17 SHA-256: 611d99d1776afeaac646741896dd7219bbfc42adfc1a7471617cc033c6691523
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress sites and disposable hosting, likely intended to lure users into downloading further malicious content. The presence of external URIs and the overall structure suggest a phishing attempt to distribute malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://pistant.ru/uplcv?utm_term=nova+launcher+ios+theme PDF link annotation
    • http://files.ibiza-ferien.de/file/58536707845.pdfIn PDF document text
    • http://canhtoanland.com/upload/files/banazujisebenixukuloza.pdfIn PDF document text
    • https://hatinhjobs.com/upload/files/58101615286.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/50654874747.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/67051461508.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac9fabaf2d---59183243712.pdfIn PDF document text
    • https://atavio.ru/files/file/dugisigegog.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16143ff52b0a48---99832811259.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/goxemesol.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef835b04ef---35704293638.pdfIn PDF document text
    • https://thingstodobahrain.net/ckfinder/userfiles/files/11751632044.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/mirunavamopidemoz.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/mamikanopotinabeki.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/127180343.pdfIn PDF document text
    • http://associazionemillesogni.it/userfiles/files/gomogipimumaku.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/vafugukusovaxekoraxusebe.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/moniguzuvip.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/titax.pdfIn PDF document text
    • http://tkhomedeco.com/assets/uploads/ckedit/files/20210905060955.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/luxekopuzu.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/52099944725.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399371eabdc---216686761.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/juwusukedizupofop.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16137296525211---49267776251.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_off0000da1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA1C 10636 bytes
SHA-256: 1bb4dba9efce9b12c3e774aff49ed0ebb7cccb15b6dbb3802c1db96b93b12105
font_01_sfnt_off0000f24a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24A 18716 bytes
SHA-256: bff0020b8cc9e8a413f441d473ab342fb7fb6b6b1490526b8a51b2d5fb91dd7a
font_02_sfnt_off00012377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12377 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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