Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce4557ffc3733af7…

MALICIOUS

PDF

71.0 KB Created: 2021-06-24 14:36:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 108288a5c12f2c364a2195004f34a93b SHA-1: 3dd2b3c571a277cff9fa23fb49f04321e9521eff SHA-256: ce4557ffc3733af7194724cb754ebfc41599cab0fe1910f8c94a0e2a7d15d70b
196 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document is designed to trick users into believing there are new or changed payment instructions, a common tactic in business email compromise attacks. The presence of numerous links to potentially compromised WordPress sites and disposable hosting further supports this, indicating a pattern of hosting malicious content on varied infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://edcasys.com/ci/userfiles/files/denopevalaf.pdf In PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc48d33a03---dixupenotojumel.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944ee41819d---pigokuzisufoxasuxadagiro.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/ff8bbffc2816462f308b0df9f9e73b04/58224996823.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160946a0fcba27---tukodetaxulidu.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/13b80409bec2fa1e9278577739f07de5/nekipusivi.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/dixepakamizojolizoje.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/jemaxofeje.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160bd18152e441---reborafaka.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160903ea995bb3---63248892795.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/8cb7e14e80049e98dff496827622ad6d/63756692589.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210617_87B47911B0683679.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/24887cc02401eb4e9da29cb9ad475dee/75264943365.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608c60fdaef78---37644481474.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/hsqccj4at7o1pjalcdo51l6ek3/67654316987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=download+science+reporter+magazine+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d307.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD307 5616 bytes
SHA-256: d0565481c3e3acb81be668353bc6309cb9299be41fdf5d4a52bf3cbbed4d641d
font_01_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 11980 bytes
SHA-256: 73fc866ca73834081d650267edfb7f2355d926a58cedd35691cd1466b7d730f7

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