Malicious PDF — malware analysis report

Static analysis result for SHA-256 4310ccea7349c2a2…

MALICIOUS

PDF

83.0 KB Created: 2021-03-30 13:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4e904d8efe7ac0345863acd2cc390c05 SHA-1: d58304fbd47cd09dc04212f29344b97fac4ca2e7 SHA-256: 4310ccea7349c2a265f3189bed975618895a2e798762a48c908c3aa7c2e13f8c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=barbados+nation+news+family+notices PDF link annotation
    • http://botavubapisod.mywebcommunity.org/life_after_death_book_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rasadenibe/jcjhgjt/88767953779.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/Qjah5fa/dead_ahead_zombie_warfare_unit_backstory.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/jgLgjja/space_engineers_update_may_2020.pdfIn PDF document text
    • http://fulifubajamo.mywebcommunity.org/america_s_test_kitchen_cooking_for_two.pdfIn PDF document text
    • http://paktum.pro/best_igt_slotsfe9io.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/samsung_tv_remote_programming.pdfIn PDF document text
    • http://ig-support-service.com/alphatrak_2_lancets9ah3o.pdfIn PDF document text
    • https://cdn.sqhk.co/jalotenabo/gijfXtl/hill_climb_racing_2_game_download_play_store.pdfIn PDF document text
    • http://kind-insta.site/soxusizogv4qnn.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/new_english_file_beginner_teacher_book_chomikuj.pdfIn PDF document text
    • http://gojawufeki.getenjoyment.net/lasko_ceramic_tower_heater_vs_motion_heat_plus.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/data_acquisition_system_book.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/e0B1Vif/31428598246.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/reconstructing_native_american_population_history.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/pisedij/jeseguwudojojeseta.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/befizejupufarew.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/2005_dodge_ram_1500_ac_problems.pdfIn PDF document text
    • http://gevejonitu.onlinewebshop.net/spring_framework_reference_documentation_4._3.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/al_quran_arabic_download.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/44009703596.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE60 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 5548 bytes
SHA-256: 417a33c80f8e155bef42638f663fac95fdf76fab07c3b464a9e0bb9b1d003de8
font_02_sfnt_off00011b3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3B 10260 bytes
SHA-256: 47f460913b4bcce0e4bb1c5e976d937008cb432b9a16d64ac1dacfaa62c67a85