Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de1dece4829c009…

MALICIOUS

PDF

87.6 KB Created: 2021-03-21 23:19:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7c0161bec7d8d082dbf3a1c61260a9c SHA-1: 2022b15c8684689f801b2006907468a7b5a31590 SHA-256: 2de1dece4829c009bd30dfc85649818d31fac34aaee256efe30ad06236b893e0
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to 'The discoverers daniel boorstin pdf' and was generated by wkhtmltopdf, suggesting a lure for users seeking specific content. The presence of numerous external URIs, many hosted on disposable domains, points towards a phishing or malware distribution scheme. No scripts were extracted, but the PDF structure and URL patterns are consistent with a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=the+discoverers+daniel+boorstin+pdf
    • http://pekefosijemibi.sportsontheweb.net/how_to_check_your_birth_star.pdf
    • http://bet-info.ru/faceapp_pro_apk_new_versionh2rjn.pdf
    • http://joritirumag.mypressonline.com/ielts_listening_practice_test_2020_with_answers_download.pdf
    • http://tomolijoponix.mypressonline.com/zojemazagexokelojevekow.pdf
    • http://dasezin.getenjoyment.net/continuous_casting_process.pdf
    • http://matimomewojime.mypressonline.com/12085196499.pdf
    • http://tunabamilusi.mypressonline.com/ielts_academic_speaking_practice_test_with_answers.pdf
    • http://bonusiotsbera.online/foto_sexualnix_devushek5cc0b.pdf
    • http://greatmasters.biz/sasefsol8p.pdf
    • http://vopezikililurab.mygamesonline.org/vivienda_definicion_arquitectura.pdf
    • http://vehicleusains.com/how_to_change_rockwell_versacut_saw_bladeg2vze.pdf
    • http://vuwefedope.sportsontheweb.net/69674073466.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://69868269-04aa-4a0d-8379-1371762fd556.filesusr.com/ugd/d8beff_87599b17f4a74ced950c6b866ffb401f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/93b3e99c-9dd7-48a8-8032-c3a5fd62ec5b/where_to_learn_cryptocurrency_trading_in_nigeria.pdf
    • https://592908bf-dd96-48cc-88d9-ffebbdd10d84.filesusr.com/ugd/f34823_dcf2d0cfa3254d06a330ef589debf366.pdf?index=true
    • http://wonanikapudidak.atwebpages.com/pejitefuropafudi.pdf
    • http://zaximibirada.epizy.com/msdn_design_guidelines_for_class_library_developers.pdf
    • https://uploads.strikinglycdn.com/files/8dca7853-a11c-4ec3-af1a-2514e638549e/88607514714.pdf
    • https://uploads.strikinglycdn.com/files/90db9894-04ec-4075-886b-39462e40b31d/significance_of_commonwealth_v_hunt.pdf
    • http://tufuripisaren.epizy.com/bistre_care_home_report.pdf
    • http://muliwavanebebo.onlinewebshop.net/vukomazirexexerojavotenam.pdf
    • https://uploads.strikinglycdn.com/files/b72b2592-ad29-4397-9098-72c880531db4/best_foods_to_eat_on_advocare_24_day_challenge.pdf
    • https://abaaaae4-9231-44fc-b12c-ad55ebcc68e7.filesusr.com/ugd/2ca09c_8c872b1e7ec9438ca79301c633a3d19e.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011760.bin
c45b10fda5959fba3b996c53194ffb9fa1c1c7310192970dd2189a68d0a4a306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11760 5392 bytes
font_01_sfnt_off000129b3.bin
08c2a5c7c790a4ce6f6780322a5be06e501f5ee35fae002f7cc6f44f4b059456		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129B3 12104 bytes

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