Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0baa56344a41993…

MALICIOUS

PDF

77.3 KB Created: 2021-02-26 15:28:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 84c581aa19d39174bb6d3a0e6b2ba21e SHA-1: da9e5bf11bcb54f3895ed8c9c3f87d0ee9ceec4e SHA-256: d0baa56344a4199339d9461eda6f7fb94a5ec94b3cd4f115561e9b51be9f9dfd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/wix?keyword=mr+burns+a+post+electric+play+pdf'. This URL is likely used to phish credentials or deliver further malware. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/wix?keyword=mr+burns+a+post+electric+play+pdf In PDF document text
    • https://cdn.sqhk.co/bajipugotox/jifjeig/11867354272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486975/normal_601652f979419.pdfIn PDF document text
    • https://cdn.sqhk.co/duwutawuna/cjajnjf/wigosozelovokew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473640/normal_5fecaf4951d4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403672/normal_60006f4559ad0.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/iajeXmw/isticker_sticker_maker_for_whatsapp_stickers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485436/normal_601eeb9cccde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_6035c907642c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/bumasaremuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/allow_filtering_in_cassandra_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/gta_4_aptoide.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/teganuvejipupufo.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/treasury_currency_manipulation_report_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/reraduzalogadelabuwaji.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/is_glass_rated_reflective.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/kannada_bhakthi_geethegalu_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/62544319049.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/27415809016.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/bumblebee_costume_transformers.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/64719949966.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/80118006501.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_off0000f289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF289 5396 bytes
SHA-256: 0ef18016c74dcf58d402e1ca10f67e404c53f805d368831f8a91ecabf25a463a
font_01_sfnt_off00010500.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10500 10152 bytes
SHA-256: 57576f990fc4395d96644f335127ab33257a29f7abb667701f019d1baa6c3fca

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