Malicious PDF — malware analysis report

Static analysis result for SHA-256 47095f01a7dedc6a…

MALICIOUS

PDF

73.3 KB Created: 2021-09-18 05:36:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 329b14ccc8ff7f83b52189eab9f29ac4 SHA-1: 5e8bcfdfb552a0ac2264883c6a1d51f219e1a404 SHA-256: 47095f01a7dedc6a4de4148339811ecc5d818e77b4c0d22626fd8606e8978189
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple compromised websites, suggesting an attempt to redirect users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/30470503308.pdf In PDF document text
    • https://inarsindbari.org/uploads/76655234250.pdfIn PDF document text
    • http://valencia.thepokeluau.com/uploads/files/navapososaloxewaj.pdfIn PDF document text
    • http://pensionpoint.cz/userfiles/files/64427165242.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/48125550169.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/25009494488.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/38096859648.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/9d3d87ed67e8f41b3914552a5c36c4f1/11597671138.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/mapegapisifozukewomobef.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1631417607.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/84483873928.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/duwekovikometazosamozoz.pdfIn PDF document text
    • http://eiffelflowersquesnel.com/userfiles/file/bojebosomi.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/78955926765.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca84b93c42---zelanugu.pdfIn PDF document text
    • https://tims.ro/ckfinder/userfiles/files/74881116716.pdfIn PDF document text
    • http://theaterbuehne-schwandorf.de/userfiles/file/nukosenubegaxamupapifawax.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/84b85cafada7e35cd1adfda861c46ec8/40682653679.pdfIn PDF document text
    • https://argumentua.com/i/file/zagejanilugekuvabegas.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210906_6403D1E08AFA2D13.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/nezuriresefes.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/runimufebunumisage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=learning+processing+second+edition+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_off0000bb99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB99 10708 bytes
SHA-256: 74a90a892c91563c363322b85d3754d759f9b574baa832e345a54e91cb03320d
font_01_sfnt_off0000d40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40E 16628 bytes
SHA-256: e7db862c231e6852b89f27974100bf97f02c02c9fa9cacef3fd148d222179333
font_02_sfnt_off0000ff09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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