Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fa7e2e748777929…

MALICIOUS

PDF

83.8 KB Created: 2021-06-17 19:59:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 8320e7704c343f2889494b50c91f3e3d SHA-1: 93e8b40cf16dfba89d388e2c8fd3b07a9c891656 SHA-256: 3fa7e2e748777929136a4dad6a8e8ec56dfa2bbaa416d595c64e67c792b72675
176 Risk Score

Malware Insights

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

This PDF file, detected by ClamAV as Pdf.Phishing.Trojan, contains numerous links pointing to compromised WordPress sites and disposable hosting. The document body, though truncated, suggests a lure related to 'Bsc mechanics notes pdf'. The presence of embedded URIs and the overall structure indicate an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://catamma.ru/uplcv?utm_term=bsc+mechanics+notes+pdf PDF link annotation
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/rjiutjnqmj1ea9lv9lte8mqft3/difikolusuvu.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/8141984e137d8728b481a9c068f0f1d4/71275579054.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/wejowopusupavoguxeraxekul.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/5622780cd36b89d2b38043440c73ef2d/vekiwupowifo.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/m23f76nij82dnhvdiaqqaf6ap3/91163759113.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748e0cc68dc---jutomilulirosebex.pdfPDF link annotation
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2b37d6d5e---lixagizoda.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a13872be843---92272400492.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/ririb.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/s5ehuqi8km72q6nchuejmcrnrm/satogesokoliretaxiwo.pdfIn PDF document text
    • http://movementlab.dk/userfiles/file/ponezopugujaragorirajis.pdfIn PDF document text
    • http://mtecommerce.it/public/news/file/44702698163.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/52831960253.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609013e053cc9---rovanom.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/dageborazenolinon.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d83fd93fe---piwoxuranigopinutenowitib.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/98546814109.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/c9579c829a175d3ed8c2a1f94980ebf3/bunekire.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010926.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10926 5316 bytes
SHA-256: f87439848869c9ea1b8e44574cb49acdf1465af96b7a7221945b7e3bf732f341
font_01_sfnt_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 11520 bytes
SHA-256: 0facb3ddb2d50ddfa2112829891fa26f72d8dcf474886ca8b9570300ac69682b

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