Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4a95f8aeba2316…

MALICIOUS

PDF

81.5 KB Created: 2021-09-03 16:46:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0dd48fd0698b3c0ab84ff137782f867a SHA-1: 41a617abc0c032dc2f77f91fb4aa42994dd11c7a SHA-256: da4a95f8aeba23165ae7d878e10d837ff4f97af5dac0cc6897fcec333ca2c923
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or manipulate search engine results. The presence of these links suggests an attempt to lure users to malicious sites, likely as part of a phishing campaign or to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://rybczewice.pl/userfiles/file/28280250096.pdf In PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b64ee91897f---pojimatanef.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/44971933939.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/sisexeradegimobajapofedit.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/vunanubowopajoxejoxaj.pdfIn PDF document text
    • http://xn--80aagkbrca3apkgkee0a1bi.xn--p1ai/ckfinder/userfiles/files/25202214866.pdfIn PDF document text
    • http://ykzn8.com/upfiles/editor/files/87929862679.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d77a4e0d93---sajov.pdfIn PDF document text
    • https://aitalk.vn/upload/files/91401970139.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/42073079938.pdfIn PDF document text
    • http://evola.it/userfiles/files/8601412614.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/fixopokopesutifavitipudiz.pdfIn PDF document text
    • http://faradbox.pl/files/file/82519158193.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/6368080028.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/fomarifelufugadubiziwi.pdfIn PDF document text
    • http://charivne.info/images/file/18766177002.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/jazesudebatovebemilegiw.pdfIn PDF document text
    • http://wksystems.net/HotelEstimator/userfiles/file/lagazofimusutamevafowudu.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/6c7aa67f0b35f0fabcc11f6083d0538f/xavejijazimerag.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/1ab84e7e88ab5ec5df9d483ea9608b1d/sunujosepigo.pdfIn PDF document text
    • http://rulada.by/upload/editor/files/mebabewi.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/f15cd73ec58c7f0d3e49196d59735ed0/wusexurogonuvezeke.pdfIn PDF document text
    • http://northphoenixmustangs66.com/clients/4/4b/4b49b54eec06ebba3741256e9f3e6f2b/File/gezonipopanefafelubuw.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072c672372d7---tunejotepugaguliwag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=enlace+quimico+ionico+y+covalente+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/nejawogologotewadasawene.pdfIn PDF document text
    • 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_off0000d8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F5 18268 bytes
SHA-256: 8fa91d79b82f65cea54e5a7c877810ecab9fab6ee9f06f990cd8d7e205504254
font_01_sfnt_off000106b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B6 10920 bytes
SHA-256: 72c579a06b03b60b28e657d3fa798cadc9938b6a45255a218e7dae6ca6d98d8c
font_02_sfnt_off00011fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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