Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bee5269b523b880…

MALICIOUS

PDF

290.5 KB Created: 2021-06-17 08:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dec296dc247208804def9f2c976a4021 SHA-1: 25f703fa159d6afbace31fa5b4ad7e58a593f970 SHA-256: 0bee5269b523b8800fd514e8835fa0ec662cc4e09d292c8fc35ed7e9e318fbec
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 5

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=the+color+monster+story+pdf PDF link annotation
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c64f36adf3---mobizesipezovuniwelori.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e2e7c2a59c---77764235468.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868ed738811---6513461991.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/42510709633.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/jgggqgrnuu6dcj8bcaqtckfl8r/resugasutikitapere.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/1d6ded24c459195053acb77cd57eb830/kegigufuditukefimora.pdfIn PDF document text
    • https://primer-spb.ru/files/files/88490681402.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a38d45eeb1c---dipukugobopov.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/hq61frlurvom85oflaf7a1qd37/wutuxogufon.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/n87aqhu2fd6sdbdl134v5eb2mk/32712003055.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/ccu1l0nnpmajnpt2qon7l3shdp/wuketirisigarofavowafip.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160772c5e8c4c8---88121593688.pdfIn PDF document text
    • http://flomojapan.com/upload/files/zesov.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/f5ede59d260da2904f140d3af6a0a0b8/mipivorepotukim.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e7c7632c9---33118956291.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/94a9dff7787126eb913addd1dae91a0a/34560703392.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/cde75ac44b8bd7fb1f89163def5762b8/novolu.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_off0004257c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4257C 5236 bytes
SHA-256: be63f9fc95ff5fb73dc69edb0b6e6818b4f28f924d8c12c97e3d00a9a79565bf
font_01_sfnt_off0004372d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4372D 14404 bytes
SHA-256: 256c39ed00faae964f7c16f542521f2e5e53912ae3e078a59ba681c1fc0a0cf0
font_02_sfnt_off0004665f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4665F 16148 bytes
SHA-256: b407b70feec14e331759dbc39aead6b0fc99af7b6a66529d043d151396b2053e