Malicious PDF — malware analysis report

Static analysis result for SHA-256 3000d3609d53efda…

MALICIOUS

PDF

88.2 KB Created: 2021-06-19 16:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 12368e7a2816ab837bc6767e4d98556e SHA-1: aaf2d7bfc1078327d0978efe0b6b679212966215 SHA-256: 3000d3609d53efda287f61f841cbbee53b33336bfa5442aa21e432762aa83d7d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML score. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The document body, though heavily obfuscated, appears to contain search terms like 'Monster Hunter Iceborne hammer', indicating a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cructi.ru/uplcv?utm_term=monster+hunter+iceborne+hammer PDF link annotation
    • http://tremonttemplemacon.com/clients/862779/File/toxalebajupagukiwu.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/bjra658toj1q7o7s6col0fmdd8/vonunulilubovatupe.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/d3ee5776488117fd37e9309b54a1a0af/malovudekuvodigiwo.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9cf646a811---xotedafoxezuduvojid.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/levamixunefoloxajori.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/dbd5c5e920002c8fca79d61b78024363/gevatebas.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e3a8c989d---sobukobimipag.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608429d095c5b---latonibinetubolufibu.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723434c612e---31568616987.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/9724906e5ba8828ff45933c62bc3e45c/60971659502.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608a74fc318eb---japipodof.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/8d1e27ca673753ec5512932f0351b0ba/zanivirurekuni.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c38e5e419b---fujuwosomelebogefemub.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace041d51b3---94054973670.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021052218093973499.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/08af30bda442d987b1c9086c1a655ba9/66031140760.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/6f5750b6b7faea6e2bebd04519c13fd7/91389727919.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/536e5f903ee55b1bb5e554f809a3b8be/poderatajufanoko.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF5 5152 bytes
SHA-256: d569ca2a264c027a6c805c3a72eb1cf3cd848d6e0a5c7c57d7555fe29d8c9cea
font_01_sfnt_off00010d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D51 1664 bytes
SHA-256: 49e893612b857d42c13f3ef59a4055669f37caedc140d3ca6fc0adb85c073c71
font_02_sfnt_off0001158d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158D 11684 bytes
SHA-256: ae39cbb269f4b08727a3b2a75434aa40afad49f4930e665739b80c70a129937a
font_03_sfnt_off00013d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D9E 16076 bytes
SHA-256: 1621a87b6bc266bc0e3d5871723ec36fa76dd6d2c9fb76f212020cc469043148

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