Malicious PDF — malware analysis report

Static analysis result for SHA-256 76da777926b0c1d2…

MALICIOUS

PDF

79.9 KB Created: 2021-08-26 10:04:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3a855f279d6189a90c9ef2eedd1fc00 SHA-1: 7d76595fb3031ae14e3f155d75be659cce390856 SHA-256: 76da777926b0c1d2833c57c3a73154acc02929b78f1e2d15eb582eb0300126b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the link farm and the detection results point towards a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://wastran.ru/uplcv?utm_term=rgb+color+yellow PDF link annotation
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/f03014a28c87d75f250ca28989f27660/baxogiliwuvumexemuwuvu.pdfIn PDF document text
    • http://446888.top/userfiles/file/nigufabakuxuvuruwo.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/1cgi72iv96j2u2hsg3hlcqktgp/lujujesura.pdfIn PDF document text
    • http://ptaki.info/imgekoprojekty/files/25143212163.pdfIn PDF document text
    • http://yksskj.com/ckfinder/userfiles/files/78928836238.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/gudagudozixejujolaf.pdfIn PDF document text
    • http://www.contal-farmer.com/uploads/files/63593817096.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/fd7a3b2d824a36bbf051087840ff88de/90854927266.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufanizegaruxawefuga.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/xonetatasotaxon.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/53088768525.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5575a4ebd---xetobuvivibeginewanuz.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/ratorujizukolo.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac79901deb---fazorazusufosoxabur.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/1411701d53ff2777b4f6427c763a6a0c/demapapikedinakupol.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f6b796252---44751581005.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/29880258090.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/51783194323.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/luxejepijotikowimux.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/tunkgtrv7s55v7rvn2rs0v3u34/lenigija.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/42eded57ccdf47a4c8fdfff0eb5f07ca/18595462414.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/836269433d9dea2f118547b7e1b8b667/lefisope.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_off0000d53c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53C 10168 bytes
SHA-256: 697e46c06e036d38c8840a16f757ae0c6f22eeca45284516b9b318931b4a71bb
font_01_sfnt_off0000ec26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC26 17800 bytes
SHA-256: bacc3d3284ca27ca5c47cb53a622b6f1fbd2322ff30dce01ffbb9d12c8b90d47
font_02_sfnt_off00011a4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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