Malicious PDF — malware analysis report

Static analysis result for SHA-256 60584b8f7ca6372b…

MALICIOUS

PDF

73.0 KB Created: 2021-06-20 04:55:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ef775bb3d896909438811ba249e6ac60 SHA-1: 664e3b58beb773b6e34310b23806dd686ed395a5 SHA-256: 60584b8f7ca6372b5088d3e50f3a54112d87dc65bdc53fa16b4df91341193e28
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It functions as a link farm, directing users to various compromised WordPress upload directories and other disposable hosting sites, likely for phishing or malware distribution. The presence of external URIs and the overall structure suggest it's part of a phishing campaign, potentially using a lure related to song downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://wastran.ru/uplcv?utm_term=all+punjabi+song+download+djpunjab PDF link annotation
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607346aea2a65---70367247668.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bfdf64ced32---bokonokusemolanijegeke.pdfIn PDF document text
    • http://ztkammer.at/uploads/file/wabixakum.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/8h00s7c6th5i87e83ri2mfqmal/62293248134.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/eadbe1318fef187b616453a57b5699fa/73810346488.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/2c6895db7fbed2456714bf860196f143/98375363647.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c2b64180a8c---12571220509.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/pa29tqjv0j61plidm81ocln5rs/ganalebizokaro.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/13251641660.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/mc6s2117vf5apklktujg7rmen1/21358836246.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/pufasegukigagewarepo.pdfIn PDF document text
    • http://titadoorbinhduong.com/upload/files/77943093179.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8cbf2f24c---79875864568.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/16095ae3fe1d57---luderezikobufix.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_off0000db91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB91 5328 bytes
SHA-256: 3461f9db3275ee33b2358dfe2d4b2a7212cf342deee0a10c77c4f3336a9be2ce
font_01_sfnt_off0000edd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD1 12868 bytes
SHA-256: bfd5df92a1c060381162ff39352e4a0d06231278f693557619f057ddc6fa16a5