Malicious PDF — malware analysis report

Static analysis result for SHA-256 575af802edd900af…

MALICIOUS

PDF

67.6 KB Created: 2021-06-13 22:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5078cd185eae34e4ef07df981f07db14 SHA-1: 58c7d826a6752f3525523c7b45e07751d299ff99 SHA-256: 575af802edd900afc8a30ee35f2eab09462f7c26db91b834aff2365ea13f6a40
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of 'utm_term' parameters in some URLs indicates tracking or redirection for malicious purposes. ClamAV and ML classifiers strongly indicate this PDF is malicious, likely serving as a phishing or malware distribution vector.

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://huntic.ru/uplcv?utm_term=tiger+zinda+hai+ringtone PDF link annotation
    • https://master-service.ro/images/file/tonokidobulofo.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/0043c747cf00ed1606e40d2627b5ae53/nonubamidikodamo.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/7b2e6194913e7a3fc4411f0dd0b053f3/860777296.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/44394369665.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/20549985c00949e7a7340ab8a0884370/zuzamabavejorux.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/zunekesuzezipa.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160725e3ded872---54670261784.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/q7cd9050rf9nfsrh4h2es5od62/xixewofupigafejamalakukep.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/laximezujosawewupafagija.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8e6942afe---77845030307.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/pnr3k23mth03imtern1v4hbjdm/1608015158.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/kaxubugovimasotimewak.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dd888b321---60021196976.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/kunetavajexarisiru.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607995987b968---fiwovi.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/9c9dc5d38764f78942bf8fd76a1f443a/68658726581.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/56491852647.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_off0000d0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E6 4876 bytes
SHA-256: 88b918949dea52d06c1dc9d318b9cf48d0721407b8debbd199ed86c0a26322d7
font_01_sfnt_off0000e17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17B 9380 bytes
SHA-256: b09127092298ad6d8432d691382a8a000ccfda7280e1c9c0dfefda76294e38cb