Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f33a95a3ece95a2…

MALICIOUS

PDF

98.6 KB Created: 2021-03-29 14:31:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 010321b9d9ae6676242a26f0a7b11895 SHA-1: a597249cbf82b6e8c9486226595984c8d778f767 SHA-256: 6f33a95a3ece95a243b68d6395af9a12ca6b02fad980adcd44a134faf21ab7ed
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to suspicious domains, suggesting it acts as a lure to external malicious sites. The presence of PDF-specific heuristics like 'PDF_URI' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the attack pattern of using the document to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/award?keyword=angai+geete+in+marathi+pdf PDF link annotation
    • http://generatorsale.ru/company_safety_plan7x0sn.pdfIn PDF document text
    • http://fekedusotuxena.iblogger.org/ny_times_crossword_answers_4_28_19.pdfIn PDF document text
    • http://flowerport.shop/kawasaki_h2r_soundk718w.pdfIn PDF document text
    • http://jebifawulu.mywebcommunity.org/breast_cancer_symptoms_in_telugu.pdfIn PDF document text
    • http://smirnoff-optic.com/zolupadavumebezkce7x.pdfIn PDF document text
    • http://xonitaj.mywebcommunity.org/22187431241.pdfIn PDF document text
    • http://helplnstagram-confirm.com/94326592185nenzm.pdfIn PDF document text
    • http://thedouche.xyz/rumomlr106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://forezepolutaju.onlinewebshop.net/waste_management_in_egypt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84cdfdfe-e03b-47ba-84ef-4d4be4a8341b/55901040062.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/dekidofiwivawisuluxufale.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/audiometria_tonal_liminar.pdfIn PDF document text
    • http://lovurezis.rf.gd/teaching_learning_approaches_and_strategies_in_peace_education.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/arlo_pro_2_app.pdfIn PDF document text
    • http://mifepotuguw.rf.gd/bibliografia_formato_apa.pdfIn PDF document text
    • http://letutemoxeluz.onlinewebshop.net/homemade_tree_stand_shooting_rest.pdfIn PDF document text
    • http://lebekad.rf.gd/xoriroxoxufodoxevili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0f84c23-e1b1-44a9-8521-06a473a8e0a9/14360450718.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_off00014851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14851 5236 bytes
SHA-256: d94bf843184641394135479f140278adad680e71b6b61259f52f15cfc30fe597
font_01_sfnt_off000159fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159FB 10840 bytes
SHA-256: 8454b686d66ea36de9b499c16dedf7854c4a523ee3612ca07a2b8990568c75aa

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