Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb40f17b4c6fbf7…

MALICIOUS

PDF

77.7 KB Created: 2021-03-02 21:47:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ab4be2adf60aaf1eb61e6b12835d1ff8 SHA-1: a867c111b7dce641a96f7bbcfef6c39db3900c6b SHA-256: ceb40f17b4c6fbf706f60db4f98c695ec84ffb409b8bd7ee3bea77dd6f6d12b6
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple external URLs, with https://dugedepap.ru/123?utm_term=operating+systems+three+easy+pieces+1.0+pdf being a prominent example, suggesting it's used to redirect users to malicious content or download further payloads. The document body, though heavily obfuscated, appears to be a lure, likely related to software downloads or technical information, to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=operating+systems+three+easy+pieces+1.0+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402280/normal_603c29aeb7305.pdfIn PDF document text
    • http://torchqbfl.fun/cunninghams_encyclopedia_of_magical_herbs_llewellyns_sourcebook_seriesq0uc8.pdfIn PDF document text
    • http://hookup157.site/96930903151asjrm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_60399ed1c415e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_601366076f820.pdfIn PDF document text
    • http://pristav.pro/why_do_we_read_sundara_kandamt24wv.pdfIn PDF document text
    • http://thestablestl.com/kali_linux_download_for_mackf2qq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368752/normal_5fe4935912e54.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/bojemazigigagapefavqtfxh.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/tfal_deep_fryer_recipes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497369/normal_5fcccb81bf59b.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/rimepusox/lexicon_app_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/zowowabobizu.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/address_format_germany.pdfIn PDF document text
    • https://s3.amazonaws.com/wutezigojuxi/79455727580.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/3292376805.pdfIn PDF document text
    • http://ninukak.epizy.com/vujazevixa.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_off0000f20c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20C 5892 bytes
SHA-256: 54709de7a9444a48d55330a826769cf02412039b179905ee435fd5010b9e9509
font_01_sfnt_off00010604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10604 10256 bytes
SHA-256: 9edc394c63e7a11576b11fa937d3ac7f57f93302209d66a80474e6d4cff766d6

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