Malicious PDF — malware analysis report

Static analysis result for SHA-256 62038769aaa08121…

MALICIOUS

PDF

77.8 KB Created: 2021-06-11 02:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: bdc78db6cbed791ae3cd72abb7708c5a SHA-1: 4d04ee0961b79e654e7452ee2ecdf8be046aa783 SHA-256: 62038769aaa08121445211f58c6fbc5346b24a7c5152c6b9f2977b886a04d683
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, specifically using a link farm hosted on compromised WordPress sites and disposable domains. The embedded URLs, such as 'https://crysiq.ru/uplcv?utm_term=minecraft+pocket+edition+apk+update', suggest an attempt to trick users into downloading a fake Minecraft update. The presence of numerous links and the ML classifier's high confidence score indicate a malicious intent to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crysiq.ru/uplcv?utm_term=minecraft+pocket+edition+apk+update PDF link annotation
    • https://abugfreemind.com/userfiles/file/vafivor.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/608853861.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4015bdcb9c---borefebusekerusepazemu.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/ea0cf0e298abb7b29c7adcc085f2171c/18095446951.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/padudigojepitovobiwelizil.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16081bd4ae1c19---84160572008.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/32c1348a43bf06c42fd241668364839e/88051685393.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/2ea4160a53e846c7a00d5e89f3cc6efc/saxemaj.pdfIn PDF document text
    • http://martonelektro.hu/files/file/10919028052.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/2932049057.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a26fbf0ba---lejomesefovosizoli.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/020a3c1269b5aea4d27070d7be1dfb05/59504626689.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/81894636811.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bbfdd06d8---49061174292.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160820a2f2c7fa---jowebu.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/896gvauo4vq2ek4ik0t3edqero/29583904679.pdfIn PDF document text
    • https:///www.minecraft.net/helpIn PDF document text
    • https:///www.minecraft.net/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 5008 bytes
SHA-256: 24b01ec29b24262a1fc5977cf0ba93dadd20ee8add265df2c78b7ffd5183cca5
font_01_sfnt_off000104cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CD 11028 bytes
SHA-256: 8d7c37cdd308423962568efe7dbbc9dcb948e8c10c3ca42d7cc9b02772bf8023