Malicious PDF — malware analysis report

Static analysis result for SHA-256 292fa5cb0690aa3d…

MALICIOUS

PDF

72.3 KB Created: 2021-03-12 14:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: f4f39f9a900b7a4b1858a30a26903925 SHA-1: ee3c9448f150fd44f9d7cbd19986a4c7cd6811d6 SHA-256: 292fa5cb0690aa3d7648a3288027209b1c4fb1200c19b81712af90e266c17053
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of numerous external links points to an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=financial+accounting+principles+concepts+and+procedures+fac1502+pdf PDF link annotation
    • https://xeromikivato.weebly.com/uploads/1/3/2/6/132695960/vofasuwunonim.pdfIn PDF document text
    • https://devigejijakefu.weebly.com/uploads/1/3/2/7/132740662/6e611c59.pdfIn PDF document text
    • http://buloshnaya.site/55905829949rgn14.pdfIn PDF document text
    • https://cdn.sqhk.co/livatunozasu/eyQjfhb/zazupodofebewaje.pdfIn PDF document text
    • http://creditpm.com/64143972209we1ed.pdfIn PDF document text
    • https://ximipozatapemo.weebly.com/uploads/1/3/5/2/135297631/3455255.pdfIn PDF document text
    • https://cdn.sqhk.co/xapunajisuzi/ie7hohh/que_significa_soar_con_uniforme_de_enfermera.pdfIn PDF document text
    • http://helpverifedbadges.com/the_circle_maker0aepf.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/pujumitaxevuna.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/GZibZjg/kuwujokak.pdfIn PDF document text
    • http://nitiwopororotef.mypressonline.com/42681019395.pdfIn PDF document text
    • http://foselosen.sportsontheweb.net/concepto_de_enfermeria_en_salud_publica_segun_la_oms.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://528a8416-53f4-4693-bcf0-540471887af1.filesusr.com/ugd/c3aa89_78b58109642740be8908b48265746da1.pdf?index=trueIn PDF document text
    • http://zaxuzut.atwebpages.com/11270775195.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/34433340732.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/18355494129.pdfIn PDF document text
    • https://8767aa75-4bd5-48c0-94ca-24e983238001.filesusr.com/ugd/debdc1_a599764032dc48389cff3a19b833c14b.pdf?index=trueIn PDF document text
    • https://661c91a2-68a2-4ae3-aaac-ef96b6cc7894.filesusr.com/ugd/b926a8_5a510bc618554f45827070df12b29cb8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/icloud_unlock_free.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_off0000da8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA8E 5728 bytes
SHA-256: dbe63014575ea1edafd3920eac589099ae9f652d12391f12bff9b64bb58986ec
font_01_sfnt_off0000ee2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2B 11248 bytes
SHA-256: 45e501ffd5d8db431d655e66d4cebd0ec92c77dabb0aa284310edfc50a5dad51

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