Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebb09515dbba29c…

MALICIOUS

PDF

77.7 KB Created: 2021-09-06 08:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ef3ee099f25e02067b94d1d059763c49 SHA-1: 4da4ecadac4f907de9f26ec53c8acf62348a38e9 SHA-256: 2ebb09515dbba29c1a5214c74c8566aba57df8eb13543fb948e915ea897a971b
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple external URLs. Several of these URLs point to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://marikakozmetika.hu/editor_up/26743996895.pdf In PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/sowujag.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/gagajekipowu.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/d51oqo9vjm6884ovbm98erll7n/30192444681.pdfIn PDF document text
    • http://wrhsclassof82.com/clients/d/dd/dd94ad2327da436b0bfbe5937c3cc641/File/wonadadiv.pdfIn PDF document text
    • http://faxik.online/ckfinder/userfiles/files/lopozuxuwotep.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/napudanamoko.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/171a6d3ed3f3f74b103f98b4921e613d/56668272862.pdfIn PDF document text
    • http://yuanjen.com/ckfinder/userfiles/files/wanufi.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3d4cb6e29---valasaxatapaluluf.pdfIn PDF document text
    • http://abcbyspu.com/ckfinder/images_store/files/37811478700.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609f650091755---bofokujezagoxijuxagaju.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607112f4af452---maful.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/8ae324fed88c0b93d700526512a8d1e2/xogudezerubajedusitixiso.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/2758511210.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/tezalasilukulenuresagu.pdfIn PDF document text
    • http://edgecs.net/documents/88655441328.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/e822npjblqu1cre1dvm3p0bgj2/jetezobebekaxudu.pdfIn PDF document text
    • http://specimport.by/files/files/dimogevivexegula.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/044d3f7aa707df61980d4ac6729675a1/3076142336.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/labadamixi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/55d289e366841c23eceb9cbae741ba19/32442150187.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=free+brand+guidelines+template+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_off0000cb45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB45 10940 bytes
SHA-256: f10783534f25424a6bf7f72f1be6a02e3da70c296842f5d1c64ee584ae9c6ebd
font_01_sfnt_off0000e41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41F 17244 bytes
SHA-256: 229d2605b62d80ed911aa774703106bc3b914ad85fe610b18da08182a64e0983
font_02_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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