Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea889d339587d59…

MALICIOUS

PDF

82.9 KB Created: 2021-03-24 12:22:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: bc8ccb6ff435908405a2007a547a37cf SHA-1: a98757b354e26416314f7bace783f690b74103d3 SHA-256: aea889d339587d59f1ef4b08f9614a6d6eced0c507f051dbc7c62471b2fd834e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The document body, though obfuscated, suggests a lure related to 'ebc caste list in gujarat pdf', aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=ebc+caste+list+in+gujarat+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366965/normal_601a17cdcf796.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407552/normal_6008ca8f9943a.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/9Bigigq/barber_shop_simulator_3d_mod_apk_unlimited_money.pdfIn PDF document text
    • http://lopixerirerenex.mywebcommunity.org/37616993899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_600e94fc22120.pdfIn PDF document text
    • http://tozofuji.scienceontheweb.net/autocad_2020_mac_product_key.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/mathematical_induction_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/heifhfx/zojepir.pdfIn PDF document text
    • https://cdn.sqhk.co/jalexire/jdEiNhf/year_end_reporting_handbook.pdfIn PDF document text
    • http://nejufez.22web.org/sewage_wastewater_treatment.pdfIn PDF document text
    • http://vepenuvix.mygamesonline.org/basic_chart_patterns_technical_analysis.pdfIn PDF document text
    • https://cdn.sqhk.co/xogudililavo/hGXspUP/knife_png_images_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_604d1600451f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471455/normal_6027e5782c5c2.pdfIn PDF document text
    • https://cdn.sqhk.co/sorubajuzoxe/idhgIlR/caponata_recipe_sicilian.pdfIn PDF document text
    • http://vewosebavukuwe.iblogger.org/35824227355.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tegiledo.epizy.com/xujudugilogapisefezujet.pdfIn PDF document text
    • http://borarizi.epizy.com/is_braun_a_good_razor.pdfIn PDF document text
    • http://zunebodiz.epizy.com/kolatemi.pdfIn PDF document text
    • http://lakiver.epizy.com/best_bedding_sheets_uk.pdfIn PDF document text
    • http://fibubaxuvuvixik.epizy.com/dabusamiwadagozexajanum.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_off00010569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10569 5496 bytes
SHA-256: 0067cddeacd43e49ef094b6e91d88e3224d325ccd3b581947a38b3ba29451f6c
font_01_sfnt_off0001182e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182E 11220 bytes
SHA-256: 45affb1f80ac1a9518558c7d370ada0d1789716c0e41f12f8f24050564579cb6

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