Malicious PDF — malware analysis report

Static analysis result for SHA-256 283abcca5a12edcb…

MALICIOUS

PDF

77.7 KB Created: 2021-03-27 15:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a4694acf54aaca31e1e3fe3737331a18 SHA-1: e3ceed5c961a8a636bac57c09b4d6d237899b6d9 SHA-256: 283abcca5a12edcbdf411ed068be732d4c666360c27c5e9467485d19f86794a2
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and one specific URL includes 'pmjay ayushman bharat card' in the query parameters, suggesting a phishing lure related to a government health program. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/123?utm_term=pmjay+ayushman+bharat+card PDF link annotation
    • https://cdn.sqhk.co/lesepivir/Iih9TXu/puzzle_test_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/jakovenuz/jjejfgj/zifefus.pdfIn PDF document text
    • https://cdn.sqhk.co/rowibimibopi/ZmYicjh/tap_the_frog_2_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/ejbhhzX/99906573641.pdfIn PDF document text
    • http://xewixejixukumes.22web.org/jotogametuwivesuzenar.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/U8kS3gd/varizubonor.pdfIn PDF document text
    • http://nujosanoze.iblogger.org/80385691112.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/fjjVBBn/zigatodiginilegerofavo.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/all_in_one_science_cbse_class_10th_term_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/satasevubu/Zgdjghf/2xl_mx_offroad_apk_obb.pdfIn PDF document text
    • https://cdn.sqhk.co/kulamogo/d7tZhfN/sandwich_definition_in_music.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/2jhOhjH/mr_bullet_bullet_many_ads.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/ley_1010_del_2006_acoso_laboral_en_colombia.pdfIn PDF document text
    • https://cdn.sqhk.co/xatuxazaz/Fiijhgf/exemple_cahier_journal_enseignant.pdfIn PDF document text
    • http://rivimebowov.22web.org/sql_server_management_studio_2016_tutorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/75abd65b-060e-400e-9ba4-ce26dbe94b92/way_of_four_elements_rework.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72806d01-4804-456c-b528-36dfc851e41c/xiwunemamita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/142a557b-d7fa-4d41-aa4a-55e9ad68a1d0/9363479490.pdfIn PDF document text
    • http://wororezijetixa.atwebpages.com/is_the_serenity_prayer_found_in_the_bible.pdfIn PDF document text
    • http://tafinefonekon.rf.gd/16._4_helping_verbs_practice_1_answers.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_off0000e3d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D8 5072 bytes
SHA-256: 1635cb1a6ee24829d4f2551ca5d192b18b442888b8f543f832206e3e1d1fff47
font_01_sfnt_off0000f4e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E0 10936 bytes
SHA-256: 2ca7dd2f9477e479eaa63d507b62aa00394d34286796601f4fd451bccd43b9b9
font_02_sfnt_off00011a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A25 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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