Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce48e2de01b3b4e…

MALICIOUS

PDF

119.2 KB Created: 2021-09-06 19:14:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0218d38352da496bf70a62448c9ecd06 SHA-1: a43808dee13340d08964adbc0fe2221a0b1aac7a SHA-256: 4ce48e2de01b3b4e7b06e6feb4e15c378b7e3b9b13367da236d32a308d196316
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF document that contains numerous links to external resources, many of which are hosted on compromised WordPress sites. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass security scanning. While no scripts were directly extracted, the presence of external links and the heuristic firings suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ljbl460gagbhigc7pb96cuk6sl/zorokenazivasafuvepu.pdf In PDF document text
    • https://ntiverification.com/userfiles/file/suzusapede.pdfIn PDF document text
    • https://frontlinetherapist.com/wp-content/plugins/super-forms/uploads/php/files/2be4e815bee792f2e63b56805a6c9bc6/vedifasumutosabomodemufi.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/rowisubajojalog.pdfIn PDF document text
    • http://kasargod.net/uploads/file/23179361554.pdfIn PDF document text
    • http://kanomax-nsk.ru/images/66430853368.pdfIn PDF document text
    • http://mariancozma.com/_user/file/62193555312.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e8b222f718---tepusazu.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/tigaborikuwuzixebarejol.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/5c4a8649481b938a1a2a267b5e25fa9e/29892522058.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89732e4a31---wezej.pdfIn PDF document text
    • https://samajsutra.com/userfiles/files/temabegefizafurimupap.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/1e50a5bb0c36bd83aa36b3da8d002969/18828290448.pdfIn PDF document text
    • http://frezerovka.by/images/fxeditor/file/79995814519.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/afdfa5dc4a177b66d28653cbe4087c94/mafawipusisa.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b89b11ad0---81946930892.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/8863275452.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/pokafupesejabifezaref.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071e13670e75---66461453911.pdfIn PDF document text
    • http://myphamhelios.vn/luutru/files/duzud.pdfIn PDF document text
    • http://etcpremium.com/userfiles/files/51046060679.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021060500022494.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/34562cacee32b5b1f0f4819eb48fe3ca/30248029781.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/102a5747f5503c21df945fbce6f37c6e/junobotunufewafuxewoki.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/laligebedudeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=concepto+de+auditoria+de+sistemas+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_off00016e5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00018675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18675 10864 bytes
SHA-256: 131d32c0c5f95d9454f1a01874f791590f1133994755d8db06d03debe18c54e7
font_02_sfnt_off00019f8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F8C 18712 bytes
SHA-256: b13bcce4deb27f4ebccd16880ccf3bdfbdce12a61ec2527a052903897a88485e

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