Malicious PDF — malware analysis report

Static analysis result for SHA-256 0607078d3e13f2ff…

MALICIOUS

PDF

84.7 KB Created: 2021-07-22 20:16:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e48d8272718a831af0abdf73558e8e63 SHA-1: d59f85032c653b3fab0ad8aa7feb6ed8aab13e09 SHA-256: 0607078d3e13f2ff2c53be7b00c637e2633526934e2ed2053fc0ede59295560b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a link farm pointing to various PDF files hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The heuristic 'SE_INVOICE_LURE' indicates the document's content is designed to mimic an invoice or payment request, a common social engineering tactic. While no scripts were directly extracted, the presence of numerous external links and the ML classifier's high confidence score suggest malicious intent, likely to lead users to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/37e95a0e6baee26a54c11b0373d034e0/19006807176.pdf In PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/9f361d05baa62bd9ebbf0a236dddb8ba/4789139315.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae082142d3---zijefuge.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/mitoxakesagelubedo.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080364e03381---bedafobik.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a662d730c60---duwijividebegorosip.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/redotevuresufibamisa.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d84b1e690---69650039983.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16076255f2088b---soxivokavuze.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace5aae4104---wimofejamifamaxav.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/mdsr6pmuberpnr07ojr7eljbjb/dajugefiwejadej.pdfIn PDF document text
    • https://hondamienbac.vn/userfiles/file/17470337600.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/75391565306.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210623014129266.pdfIn PDF document text
    • http://phatnang.com/media/ftp/file/2498222876.pdfIn PDF document text
    • http://asfalon.com/__files/file/86619956658.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/f74fa67512b38f7ed16a7469cc70639b/fopelupol.pdfIn PDF document text
    • http://gusanhightec.com/userData/board/file/86784905444.pdfIn PDF document text
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/53677030882.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/70337740590.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f6cd4a8f2---43313383400.pdfIn PDF document text
    • http://rymwid-training.com/userfiles/file/88908299905.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/d38858f5f06d1cd9066bb2ad44dc9276/katiwidusokuduzijizupuv.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160739119b6a5f---60745435529.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3741903b9a---nogetobanuwaranofajogabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=purchase+request+form+template+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_off0000e5c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C3 10936 bytes
SHA-256: 9f6572748cf736a6af8cce0a97ab692d4c4b7064633a2b418f6c0585169651e7
font_01_sfnt_off0000fef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF8 17068 bytes
SHA-256: f65e40f77aadbdf36a680626631abb6193112aa7514e18ef860d4401090cefba
font_02_sfnt_off00012b95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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