Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d0ad98547cce57b…

MALICIOUS

PDF

81.9 KB Created: 2021-09-11 03:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 79ccc1980a5e7d50a20eac4eb6d4cbf2 SHA-1: c7278c062ed0f13d7e8b059231ef3629785fcfd9 SHA-256: 1d0ad98547cce57bf98060b030f5fc7781f5e69f2140e25599902a603bb2d3a5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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 http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/1ba828af0914b13d4719153b9210ff96/34092137540.pdf In PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138fd3ab5a4b---1093326960.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/pisumofin.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/nosiritowibewibow.pdfIn PDF document text
    • https://cape-electronics.com/media/file/72173210233.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/fodunifozifebivuwojuvela.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/27668621931.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/hfagoptkj5chkdsorb0ofgn1n5/93336971916.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/55227421016.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210903043804170.pdfIn PDF document text
    • https://inprovitecuador.com/ckfinder/userfiles/files/divuzisodoromuxojom.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/67897602281.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/sasisesejosopakakarop.pdfIn PDF document text
    • https://quasar.mago.ro/ckfinder/userfiles/files/jetefifuvo.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/14061530407.pdfIn PDF document text
    • http://twgo8.com/uploads/base/files/202109080753245658.pdfIn PDF document text
    • http://timnhanhonline.com/upload/files/tofudoguvadidusirixim.pdfIn PDF document text
    • http://xhiehchin.com/Xhieh_News/_file/jekatefetibitobidutiga.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/65622934931.pdfIn PDF document text
    • http://selidbe-beograd.info/files/44709373044.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/94267827772.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/12706052326.pdfIn PDF document text
    • http://gaytonfa.com/upload/files/78587677846.pdfIn PDF document text
    • http://fishingas.com/userfiles/file/5273687875.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=new+real+book+2+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_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 17480 bytes
SHA-256: b283b6a5a5f3f4ef26c5cb37c0d411e36c16c9c6888480eb294891668a6a9f79
font_01_sfnt_off00010a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 10444 bytes
SHA-256: 5df3fb6b88dbc210017b0cd57b4f8dae89895d34b5168978c3238dad56bb0a3c