Malicious PDF — malware analysis report

Static analysis result for SHA-256 2240d710371e2bf2…

MALICIOUS

PDF

74.4 KB Created: 2021-06-24 18:30:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5f34f9fef3b7a17ccd76bcf0f1ab648a SHA-1: fb38f21428d386586581b9ab4d73e5cdb4ad1630 SHA-256: 2240d710371e2bf2182a5d05f52346b4e45586078ebee716d4a4da9e1ca23bd7
156 Risk Score

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It leverages a link farm hosted on compromised WordPress sites, suggesting an attempt to distribute further malicious content. The document body, though heavily obfuscated, contains references to file conversion tools, likely a lure to disguise its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/cb2b93e2700904f596792a1729fe3fd6/muxipirazadusexelebutuda.pdf
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/f23472e8937bcf85deafd8bf9ec9c6e7/rakisusepuno.pdf
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/16077f3c211123---nekerotoxudixu.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0237444de40ed90e1690f7631775ad54/35238562555.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16079ad14b75fb---sadirutadufelo.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b647b4e7e2f---72471054314.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf96fbe661---32771846263.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081855d68ba7---860135381.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/d1e266d1b41e99b6a97383fa974f7440/wizewumawabowoze.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/ckmek9mr0463sd3h8g4513udsi/39888777153.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/e3aeb72a2fbfa8b5b0e8207187f2c2c8/95406233362.pdf
    • http://alexlunacoach.com/img/editor/file/tezago.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d85d474787---mudowobilosevakesulutus.pdf
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xawaputalep.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bb4f3cfdf---bapajodajegawuworegogub.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=convert+xps+to+pdf+open+source
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e790.bin
397a0add18784cef448821696f56e62e1c7a48020827acbf46ecc8cf1ed9eda5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE790 4940 bytes
font_01_sfnt_off0000f879.bin
961a5e51b95fca53e0c66bf575629468223dbf6dcc1a2f8d47fa9dc4dd469e40		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 10676 bytes

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