Malicious PDF — malware analysis report

Static analysis result for SHA-256 466eec3e904c3167…

MALICIOUS

PDF

85.7 KB Created: 2021-06-27 20:19:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3edd749ae6c1a4643eefc60722f1c8e6 SHA-1: ff45f248d574d1a993bfcfe6e2a87d01d1b6cdeb SHA-256: 466eec3e904c3167161c550df46e4035f7b67c2856de3ed98b66e302a93b0189
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised websites or disposable hosting. These links are designed to mimic legitimate software download pages, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection or download process, contributing to the overall malicious intent of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://smidgel.ru/uplcv?utm_term=windows+8.1+media+creation+tool+download PDF link annotation
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02b26315e5---xitabem.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/20814059175.pdfIn PDF document text
    • https://raljob.com/userfiles/file/mopopikisikuxadogojopapin.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16096ce4f0fdbd---8317871682.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/1jd8vcadlenpv0kuuegkgbcct3/tobuzisajakipik.pdfIn PDF document text
    • http://ruilong-ironwork.com/CKEdit/upload/files/69771256186.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607766b835c2d---navenadupulofud.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/d2c792edb9d34604f59e20cc6539a3ce/fegikotasigudamaligix.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/36512784782.pdfIn PDF document text
    • http://anupbolivia.com/images/files/zesibegasoxoze.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f878f0b47c---18063892733.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/e43a6ce7ff9300ec9ef14502d170ef9d/88946620050.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607aea8c09988---43600224246.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/1320d4c453e821246f11c80c8e1ed22b/weximebunolezotuwazupug.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/b128825807b2da3a79f023838d8fdd6b/90110344028.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609834c149e13---nolemefod.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bae44a6c5---fozagox.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/4ngu9gcv4muiavqah65q29grm1/7106461563.pdfIn PDF document text
    • http://0930actress.com/files/files/17389318233.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/69a3913c02c212c7d8a3b56058c8d859/xesefadajipe.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/63042310253.pdfIn PDF document text
    • http://51-lq.com/userfiles/file///kesivowofepovaj.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/rotowafomupesi.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_off0000eb0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0E 17180 bytes
SHA-256: f0aef434c23837c59d7cac3d5eb16847d0dfe03a4eecdaed441645114a05dc0d
font_01_sfnt_off00011802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11802 10936 bytes
SHA-256: 5d6a7c7b9a47b23c8231fc40a2b04a520b36a972f9af08c38b8bed3b3ba36f41
font_02_sfnt_off00013172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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