Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6a2ce474caffe8d…

MALICIOUS

PDF

93.8 KB Created: 2021-07-14 01:30:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e7b9214fb54c0d708a508e0c44a3aac4 SHA-1: 486825e74a34219d39af265a7eb1bf5f51e1a723 SHA-256: a6a2ce474caffe8d1ecf0d2a24dab48335e22a3e999e129d0823cea6bc928652
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/2lhspnslbc7ed4t4uo1e1ajnp6/powumaxubapuzowavonukuf.pdf In PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/josupo.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/8j9f0pbeav4qki72s0h5mubig4/59025489482.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/42510652700.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/6d051dc57ce9d8c0a01393d6931db4d6/sujegiz.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9e0b91223---95663942077.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0943555fd385cd161c12c4e54e29003f/30322616789.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8cc784b6f---72917637105.pdfIn PDF document text
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/a1a103ef230f62851de4b87450198738/94546853712.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe6de1ebda---38158102857.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16094776d5968d---bubuze.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/6b0fd7ef7a3acd9ef5399a59e2354eb4/kebabosafudakeminaseva.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/69239638980.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/84965255649.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/31379297100.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/54d3e0f2c002c3b865c554c49b23de06/61889018418.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c869425c0d3---kugubipotapa.pdfIn PDF document text
    • http://polipack.ru/content/file/sefipemejuduwevebawo.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/96045910970.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ede182790474f539e8a57851919b598b/tixunun.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/52297277860.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/ledixupinexibepekafolutet.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/57477633467.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=martha+beck+finding+your+own+north+star+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_off00010c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8D 11380 bytes
SHA-256: b414e92342f98e1524479bc9aa846b47dc92e91bb7d293e1f4c02825a10bc98b
font_01_sfnt_off00012707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12707 17096 bytes
SHA-256: 884f9e2a958a25652cf336727ad431f8d33e11c35a739e75a50e26038e6be5b5
font_02_sfnt_off000152ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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