Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a971c908e1f049e…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 06:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f000bdbd9a3fa67fc4dd1a5c031545a3 SHA-1: 7f91e51a933723b24217f70248d17305ced03d37 SHA-256: 7a971c908e1f049e89a838b634011306cad25e4fc9a114b03e5d6df732db5c2c
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, leveraging a link farm hosted on compromised WordPress sites and disposable domains. The embedded URLs, such as 'https://irlanc.ru/uplcv?utm_term=waiting+on+me', are designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=waiting+on+me PDF link annotation
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd97f5ec9c9---nurededavidula.pdfIn PDF document text
    • http://simonide.org/userfiles/file/95832079945.pdfIn PDF document text
    • https://rivaflo-south.in/userfiles/files/jefosexarepene.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1610f9a04d5d6b---lotekasa.pdfIn PDF document text
    • http://texmet.pl/userimages/file/65855598003.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/47396812882.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a5c7882b7---37965084997.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/depoxex.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b08b53d171f---19810521368.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160b4f4c5e72a7---80371713512.pdfPDF link annotation
    • http://oticonshop.com/ckfinder/userfiles/files/7910670679.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1626627761.pdfIn PDF document text
    • https://multimetrics.com/ckfinder/userfiles/files/zifiretodijoxaza.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/fedevediwuwuxe.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612d3a946073f---nadexedanomobebalijosi.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/8e6b257d7b39fe87655806ca095005b0/guronagusebunuxofo.pdfIn PDF document text
    • https://intrigantka.ru/images/userfiles/file/44969197373.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a607f5ce529---98405138356.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/d929a61e7a7891347c7621416ecb373b/18475559597.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/1fte9bro7uk9rofmhiubmobhh2/supefanafojodi.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/biduvuxusuw.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/s30o1ol3qb6u2bqj6mgsp021t1/fudusi.pdfIn PDF document text
    • http://dakmet.pl/upload/3933565108.pdfIn PDF document text
    • http://ciskmv.com/css/file/20385117887.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_off0000e926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE926 18172 bytes
SHA-256: d423273976615bea5dd948de5c72d0ff5c4439123b1b96460ad4599e79518ed6
font_01_sfnt_off00011892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11892 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000130a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A9 10128 bytes
SHA-256: 2744d87cd05aef3f159d1787e5679fbe73618f0f17e85ee0d2c4f2c1e66e5221