Malicious PDF — malware analysis report

Static analysis result for SHA-256 89697f39ca794606…

MALICIOUS

PDF

98.4 KB Created: 2021-06-10 07:55:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 527c58045ae3a997b14799f38e78831c SHA-1: 185645472d5489b029825556cf904eaddd82b93f SHA-256: 89697f39ca79460632fe5c1b8bd52003b0c6b6b91f4df315222cb8baf13fc768
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains numerous URLs, many hosted on compromised WordPress sites, suggesting it functions as a link farm to direct users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to exploit users through deceptive links, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=coc+9th+war+base PDF link annotation
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/4cbac33bfab9858f2aa4d9ace43156b0/woxosirasedezarajanoj.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/76388814098.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/25c457149419dc33bfa141f20e759178/42248900582.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160949968caab7---21984897731.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/d2e5b95f28652d0d422b53d09b034748/67094991561.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ae4bba0a850ecf43a54b3f5933831869/woporiginirebexeguwon.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8bbb1a602---fomaxu.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/18534629376.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/96uivd1drhslbi17p6h7s2rm2j/lojekulusida.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607017600825f---82643306856.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/9m03m45g4t5cn3onstuss9ie41/bedikudulepubiparibuvada.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b49249ceee---17895888050.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fded170329---gazixivowanug.pdfIn PDF document text
    • https://designclarf.it/file/jitekutitenupikofazope.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071cc2f587f8---37310135519.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607df6003304e---fewimive.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/milawusaboma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn 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_off00012d30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D30 5148 bytes
SHA-256: 1ce4b03d0f5c06afa20e47935a6a1e0e9e655b5df53aa8b3473bca991759f45b
font_01_sfnt_off00013eb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EB8 11740 bytes
SHA-256: 639b06e55cfe6d09134fa455d44818c0c499d9038e2cf47c6933d27af736a999
font_02_sfnt_off00016707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16707 16212 bytes
SHA-256: ec642c0c8cb4f3b35d1f73599536827236816adbcc6de52dc79cf03831f5195b

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