Malicious PDF — malware analysis report

Static analysis result for SHA-256 b03331e4ded1172d…

MALICIOUS

PDF

74.3 KB Created: 2021-06-20 10:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 9e842f5f21bef6ef30976e7eb3f6e1bb SHA-1: 0b4a153041bf14f54f52566226befde55ef5bec8 SHA-256: b03331e4ded1172de9f6f2617c49b97c6df932d6a15d6cb6caebb7acda6dc642
156 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'Virtual dj 8 full crack free download', indicating a lure for cracked software. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pixomot.ru/uplcv?utm_term=virtual+dj+8+full+crack+free+download PDF link annotation
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/k7em5e1ijj5tr62gcr8id2boe0/38292443478.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0dc5026d1---3541754202.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/601vdfoojdcvllqbth8id2ampm/busuzawajexoralefe.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082bc1b318ac---80900987417.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a451827e73a---1517632649.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/negazubunapu.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/39vtqjhkg1c2ilkn0i2f9vfhl7/82874392211.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8fd1b53f---1278688522.pdfIn PDF document text
    • http://katachizu.com/img/news/files/92110065739.pdfIn PDF document text
    • https://proxus.nl/file/genokewubulibiwugepaturab.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/kvntnlu6s8ii99725mmq8l4km8/23361986524.pdfIn PDF document text
    • http://amdind.com/userfiles/file/17358220372.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081dbc2af56a---8828989553.pdfIn PDF document text
    • http://usmleworkout.com/files/file/tenasiwegazeniwenud.pdfIn 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_off0000d596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD596 5228 bytes
SHA-256: 69f833cef459a34acc6edc9b1297552bf8b5b993e0bf9874f5996cdb82938af4
font_01_sfnt_off0000e787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE787 23780 bytes
SHA-256: 3fbc64f2222424c54f9f38341229299d680af8827cee08fac5ad0d898c28a719