Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9e465bcfceffd2…

MALICIOUS

PDF

95.8 KB Created: 2021-08-17 22:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 30524308dcaefe6da4acdd4015261dc6 SHA-1: 06d44f8f9a81bcb746bc7fa9579f33372679df34 SHA-256: cf9e465bcfceffd26946820952df33b09d382cf88fee124c3820320678113229
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of links pointing to compromised WordPress upload directories. These links are likely used to host and distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, with the overall pattern suggesting a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f5bf0a78646---92361141428.pdf In PDF document text
    • http://icsbc.ru/fuploader//file/xelabaranekat.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160787159315b7---xatifevozosesuxewi.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/68974944162.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/66294609186.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/dd449ffb9e214716a42b7a03d0779c9d/62235435889.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c7a6ae39e5a---wibanovijukaxufaxofixegef.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/f9e1659cfd1affda6b80a805de928e2c/bozolavutotopobujasuw.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/totagibirewaw.pdfIn PDF document text
    • http://peneleos.pl/userfiles/file/dekut.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/007c1a4e9ca95c331b63937dcf3fbfcd/1928446043.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070cf55389b3---munologigami.pdfIn PDF document text
    • http://joesservicecenternj.com/userfiles/files/xesipafi.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/fevumezig.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/damusinido.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/h2k3khkpt8no6kjuhj7b39gqr8/monuzasopapotabe.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/94767936580.pdfIn PDF document text
    • http://fotobambagiotti.it/userfiles/files/disozovupasupexulofisuvel.pdfIn PDF document text
    • http://fotografoenricogiampieri.it/userfiles/files/natowez.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0196eb6299---93897729842.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/genugitasuzuzavimij.pdfIn PDF document text
    • https://publicbridge.pl/userfiles/file/wisid.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160adba4ded4b1---nolulawi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=harry+potter+and+the+goblet+of+fire+book+chaptersPDF 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_off000113f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F8 16788 bytes
SHA-256: 4b17f9fbb9162d52b1afcf78602f72d845d5fbdc2d2e0e8ddcf8300454af985c
font_01_sfnt_off00013fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FA9 11236 bytes
SHA-256: d34d16836db2062505d2a7c36e2adb738bb85beddf8d28f14eb4c327302891c5
font_02_sfnt_off00015977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15977 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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