Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f00a0b1102bf10d…

MALICIOUS

PDF

81.2 KB Created: 2021-09-09 10:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f3f4e0a14d2bc721e881cbd6d521107a SHA-1: 106012ef6d3f0a8f995442f91fbb4ddef02f1d6c SHA-256: 9f00a0b1102bf10d0ddef5a33c04485b1d89ecb3c4ae9c5682dc7702a6c2650d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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 https://aayams.com/userfiles/file/jozurivinuko.pdf In PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135969f83824---kexurezexoji.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/11751782471.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16130bf371bf4d---95924547042.pdfIn PDF document text
    • http://maivietnamesecotati.com/uploads/files/sasipuk.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/pedaluluvaz.pdfIn PDF document text
    • http://mcdanielz.eu/files/file/rurigowilokotiwuzopirilul.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/983c01c29197f509af12f238d8a17df2/17339362922.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613927ddbdd7f---pejimikokapar.pdfIn PDF document text
    • http://toyotaprius-custom.com/js/upload/files/98131764189.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/fuo3rd97m95o7ok7p4j6o3t4fg/midexeneka.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/moxifokinar.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210903032817.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/rosux.pdfIn PDF document text
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/17875269565.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/34637264688.pdfIn PDF document text
    • http://insuralead.com/userfiles/file/rinafapalokimet.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/mapuxaxowosaju.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/pevuliwexu.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/dixudusoluxuzixegotuf.pdfIn PDF document text
    • http://modamoda.nl/uploads/pic_lib/file/vidufikumadogena.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/15006177d55f405d1f55ee4094bff7fb/nawavakafalix.pdfIn PDF document text
    • https://spacio.hk/attachment/file/fogepifebinolod.pdfIn PDF document text
    • http://studiolaviano.it/userfiles/files/bamemodivavapopuwuj.pdfIn PDF document text
    • http://optykglowacki.pl/obrazki/files/8986612934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=recovery+mode+no+command+nexus+5xPDF 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_off0000d8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C0 10856 bytes
SHA-256: 26996b70f2f15197ab1f21fc37b889ce8cfc10974d292ac5c6b39e3b3063b2cf
font_01_sfnt_off0000f1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E9 17148 bytes
SHA-256: 1bf2f9e16fe3468a9bbb39577a39a4fbb34de99c2b60c1ef5dde73362d66b134
font_02_sfnt_off00011f1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.