Malicious PDF — malware analysis report

Static analysis result for SHA-256 614d93f382f591e9…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 02:03:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c055fd1aa7f6cdd771bca13fc6302100 SHA-1: 48c3b66bdcbb7838492611909c7e9092fd61a8b4 SHA-256: 614d93f382f591e942116b2153ea1e62eaf49a22a2e67d48ffaf0723b853467b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites or disposable domains, suggesting a phishing or malware distribution attempt. The embedded URLs are designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=the+godfather+notebook+pdf PDF link annotation
    • https://majubesar.com/contents/files/74891445936.pdfIn PDF document text
    • https://abouelhoulgroup.com/userfiles/files/30008931925.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161393795b5259---68191797207.pdfIn PDF document text
    • http://uteambio.com/upload/files/8441617424.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/rusekuga.pdfIn PDF document text
    • http://hiredriver.com/uploads/assets/files/15865207526.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/63248141723.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/90f19698a2f0d7e5b7c7f7b1e38e2707/96892084609.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/nufivoza.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/91752145060.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1665a9fe3635fc862542907612fa5c98/8619965395.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/79886484602.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/bivow.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/52651382897.pdfIn PDF document text
    • http://falerisztika.hu/tmp/54041257242.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/58571771492.pdfIn PDF document text
    • http://inbeeldt.nl/userfiles/file/pulinewemomepel.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/37390928745.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/livomuxutadofug.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/34130152721.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/kolesuvadoderusawivajaki.pdfIn PDF document text
    • http://alajwakh.com/uploaded_files/userfiles/files/15577992023.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_off0000d51b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD51B 10668 bytes
SHA-256: 5464e7407b3e09a38ec990895016eb34d64390da3c6a8780d60256d9adb8d2db
font_01_sfnt_off0000ed0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0E 18308 bytes
SHA-256: d2ba47b15523d708926ec9353ce7ef1a9a8b3e40c955f4bd22f709adc9c45059
font_02_sfnt_off00011c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1