Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd98a063329d1f7b…

MALICIOUS

PDF

78.4 KB Created: 2021-03-25 13:34:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e1cd290905a126aad9e041e365d903d3 SHA-1: 612e3b8fca5153718ad65952841c31fef91327da SHA-256: cd98a063329d1f7b3e8104a071a37a0f68d279f1935e750789ebed278275022a
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'dugedepap.ru', which is likely part of a phishing campaign. The PDF's structure and embedded content suggest it's designed to trick users into visiting a malicious site, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/award?keyword=que+es+calidad+ambiental+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471703/normal_5fe074b9bf663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_60236ccb80575.pdfIn PDF document text
    • https://cdn.sqhk.co/xuruwivagezu/c9hjfhi/34805143514.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxowowi/7mieYJU/16042830028.pdfIn PDF document text
    • http://lofoporubatul.mygamesonline.org/liwafalapasolupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385612/normal_6045f42479597.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/gjgOShe/redream_retroarch_bios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495526/normal_5fd715611e094.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_6035ac64efb98.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidatoxo/I98ghib/lawuga.pdfIn PDF document text
    • http://duwudivusupo.mygamesonline.org/equivalent_fraction_bars_worksheet.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/vokudevagijamumuduse.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopivosoba/hjievmZ/lekejijurewot.pdfIn PDF document text
    • https://cdn.sqhk.co/dorodidur/bbJNkrK/jesixatojimezavoza.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/Giea3Si/train_to_gensan_mod_apk_unlimited_ducks.pdfIn PDF document text
    • https://cdn.sqhk.co/xupasutejos/fjg4b6e/20537403391.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/xilasisefi/vatiburilusakobi.pdfIn PDF document text
    • http://vonanovab.epizy.com/jozenavot.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/90501400190.pdfIn PDF document text
    • http://terekeduwowe.rf.gd/39462312285.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/86077473272.pdfIn PDF document text
    • http://sopexalibip.onlinewebshop.net/sowilukezizo.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/nkba_31_kitchen_planning_guidelines.pdfIn PDF document text
    • http://jezuwujitek.epizy.com/ceclor_bd_500_bula.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/how_to_set_a_marathon_wr30m_watch.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_off0000f4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E8 5404 bytes
SHA-256: ff27751b51d4b323acce554b46ada8fb672466493ba626e5c33d8a2c6278bb28
font_01_sfnt_off00010735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10735 10620 bytes
SHA-256: 564e59e0c04c2b23d5cb5830b1c22f72f332f888c8fe7468f6cb9af5cd8454bc

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