Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcd69ed97ff38a6…

MALICIOUS

PDF

133.5 KB Created: 2021-03-24 01:52:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: a4a3fe39ce450c37a87ba2582cd34cc6 SHA-1: 5ca9e9417b1ee2376b3eac5cf7b9e4ca18e72d48 SHA-256: ddcd69ed97ff38a681f63aded3b7ebdca610bab269c2cef7a4d622bb0cba965d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as a link farm. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. The presence of external URIs and the link farm heuristic strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/award?keyword=efy+electronics+projects+pdf PDF link annotation
    • http://melotedi.iblogger.org/female_biblical_names_that_start_with_j.pdfIn PDF document text
    • http://realwockyc.info/night_shift_cast_season_2n4emu.pdfIn PDF document text
    • http://trenketo.buzz/amaze_meaning_sa_tagalogc8xo5.pdfIn PDF document text
    • http://alisabor.design/pinexirevagabegonerixabncbat.pdfIn PDF document text
    • http://sponsor.rest/wrestling_revolution_wwe_mod_apk_downloadar8wf.pdfIn PDF document text
    • http://favanitum.iblogger.org/lexunazisukovetilevodokid.pdfIn PDF document text
    • http://domen3.club/64153273711kmjf6.pdfIn PDF document text
    • http://tonagruz.ru/voligixuvewebuchu1h.pdfIn PDF document text
    • http://daddytestit.xyz/six_of_crows_book_2b0yfm.pdfIn PDF document text
    • http://matrixbicycles.com/499776747125us1e.pdfIn PDF document text
    • http://verifybadgesbusiness.com/irregular_verbs_simple_past_exercise02kms.pdfIn PDF document text
    • http://nubolutlion.xyz/32661310869nigve.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd52031-89c6-45aa-8c5e-7019098c202c/ny_drivers_manual_in_arabic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51dca43-38a4-434a-a243-b04361e3a6fd/90691548.pdfIn PDF document text
    • http://xafofeb.epizy.com/automotive_anti_lock_brake_systems_abs_haynes_techbook.pdfIn PDF document text
    • http://vatasinunevuto.epizy.com/42024311559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64aba4d0-fa0e-4bda-abb7-a69a05fdc69b/against_the_gods_the_remarkable_story_of_risk_epub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4699c149-4c09-4a34-9fad-2337b64fe704/miwakuxufanapusomamutuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5439890c-2082-4c52-8545-6ab5a99f847d/why_is_the_rising_sun_badge_important.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82ec28b1-2d75-4ec0-bdec-3c5aefa82a60/37330989034.pdfIn PDF document text
    • http://gakubik.epizy.com/koruvilugebokomeroguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42ea6f7-c463-4b96-b0de-6f0495d6d046/singer_20u_zig_zag_sewing_machine.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_off0001d21b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D21B 5072 bytes
SHA-256: bcc51b451d03df34a54aee8cea7d60b7fa53ee7d587cac0c58848e0818387b22
font_01_sfnt_off0001e387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E387 10700 bytes
SHA-256: 9f4f67c05278a72c8f81b61ae076f188fc4d8ab6eac9e4d0c412c57cbbf31bec

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