Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e075f472fca58ae…

MALICIOUS

PDF

91.4 KB Created: 2021-07-18 11:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f95c9e24cf0b631cc249568825ade18d SHA-1: 284761f4ddcb6bc545cfb2eae423f9d73e4fc7ac SHA-256: 4e075f472fca58ae6a8ea6e7c7d4cfbee6fba2b6b77d60170e28b55449081011
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress upload storage. The presence of these links suggests an intent to redirect users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://impeka.lt/components/com_mijoshop/opencart/image/data/files/vefibafolurovavunelare.pdf In PDF document text
    • http://55thocscompany.com/clients/62662/File/7069064351.pdfIn PDF document text
    • http://0851gay.org/userfiles/202106file/2021062020423670554.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/mozitebibopavirozupuzotov.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/976920c3360363dc1682f9ef820079db/52667739200.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/kogapevutokurarod.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5493a555ce---81068069415.pdfIn PDF document text
    • https://ijp2.com/contents//files/3045933378.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbdaf678228---losukesidogamakeveboxit.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/kue08fmsa3rjh1l0abfn2ck386/bosukanamabajivil.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/50194622345.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160704758ee9f2---dekobexuseferasa.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/waruvimewasegajegulira.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4fa5409cd317da23008ace1e1106c2e4/zekizoxonaju.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/533914cd91b9efbb75a35f12d94ab470/nijekezazigekisivegem.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/rogiwikopubowituxoge.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072024eb984e---85309398922.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/46387130925.pdfIn PDF document text
    • http://hsiwww.com/image/files/20210716_173201.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/kipixufipirixagawamevix.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7c5fd9484---11816804314.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/070c6515b73f81423f87301d596f4381/96125698603.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/h9u1j49nv6h3s13bmcqutrkrr0/vitagigo.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ac3dbd252.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/kotekosigaxisabajizi.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/fupasenamalizikovimamona.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=louise+hay+heal+your+body+listPDF 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_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C63 10552 bytes
SHA-256: bc1638a456178738d53cbe9fe91e945f3d3469668bd37c3a18057a7044c87889
font_02_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 17000 bytes
SHA-256: 706293a07f7cd76c13dfd49b75852c87c3c846510200722e9409e6ded76c7b62

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