Malicious PDF — malware analysis report

Static analysis result for SHA-256 7058584d1e3b7454…

MALICIOUS

PDF

56.8 KB Created: 2021-09-23 06:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 47d60f3cdb6cca35216df0391055029c SHA-1: 62300a03582c0848febcd90505c87ff4081a5f37 SHA-256: 7058584d1e3b7454ed120776ba7497aad602df126a4851c410555c3cc6679e55
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URLs, many hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to trick users into downloading further malicious content or visiting phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8244

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.
  • 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
  • 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://chcial.ru/uplcv?utm_term=download+ghost+recon+breakpoint+android PDF link annotation
    • http://kammed.com/userfiles/file/48560952407.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/64221705143.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/48af91eb713a44528003dab95135c850/rirakexot.pdfIn PDF document text
    • http://werkschoenenverkoop.nl/images/docman/files/xomagagobudavafonixi.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/liwov.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/89729740642.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/48751761159.pdfIn PDF document text
    • http://severstroysnab.ru/userfiles/file/pofenilew.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/36539985918.pdfIn PDF document text
    • http://drcleancenter.com/uploads/files/202109120604245826.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/53601217548.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/54217212444.pdfIn PDF document text
    • http://powerfalcon.net/uppic/files/ropefodafetipi.pdfIn PDF document text
    • http://firewheels.pe/userfiles/file/81174465814.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614932bb4ad74---kejejuxokagebarak.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/32616166126.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/25256709946.pdfIn PDF document text
    • http://xsteelstock.com/d/files/38943333980.pdfIn PDF document text
    • http://pnc21.com/files/fckeditor/file/879049196613253c898ad7.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f88a61e6c4---gisedovozurumemiv.pdfIn PDF document text
    • https://subded.org/userfiles/file/forijolofot.pdfIn PDF document text
    • https://dol-rtknetwork.com/uploads/files/76777732251.pdfIn PDF document text
    • http://fohow77.ru/upload/file/8909916308.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/hdverg114db9ul58d4fp39m1fl/gukerafibivonimibeba.pdfIn PDF document text
    • http://haozuowenwang.com/imagefiles/file/18883336980.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CC 11112 bytes
SHA-256: 27777a0de42c418198de34e6a7086a53bc998898f9c708a7a16bce67c81053bf

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