Malicious PDF — malware analysis report

Static analysis result for SHA-256 67a951a043b06edd…

MALICIOUS

PDF

78.3 KB Created: 2021-03-21 06:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4affb09168f924ae6b23f6e320a2189 SHA-1: dd9f43ed7c30357329de3b6fa5813888087eb53a SHA-256: 67a951a043b06eddd32a2162162028a59f10dcfcc4cc3817009aa2aee500c0a7
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The document body, though heavily obfuscated, contains text related to 'Mcq on periodic table pdf', serving as a lure to the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=mcq+on+periodic+table+pdf
    • https://cdn-cms.f-static.net/uploads/4390329/normal_602d5bd2bee51.pdf
    • https://cdn-cms.f-static.net/uploads/4480884/normal_602541bb7d148.pdf
    • http://losopefopamusoz.sportsontheweb.net/problem_solving.pdf
    • http://muzomabavima.medianewsonline.com/jabalor.pdf
    • http://dorutote.scienceontheweb.net/causes_and_effects_of_acid_rain.pdf
    • http://dofujifeluradep.medianewsonline.com/jurnal_asuhan_keperawatan_penyakit_jantung_koroner.pdf
    • https://cdn-cms.f-static.net/uploads/4474465/normal_6011ebcfde0f2.pdf
    • http://fexevewuli.mypressonline.com/what_is_psychoanalysis_in_simple_terms.pdf
    • http://lafilubepojev.scienceontheweb.net/budgeting_and_financial_management_in_education.pdf
    • http://jefevivavifax.scienceontheweb.net/history_of_web_design.pdf
    • http://itawegan.space/32914650821s0q42.pdf
    • http://world-wildshop.com/appiah_cosmopolitanismh2ivn.pdf
    • https://cdn-cms.f-static.net/uploads/4450419/normal_6021274461cc8.pdf
    • http://xulazawelinuze.scienceontheweb.net/how_to_get_used_to_first_pair_of_glasses.pdf
    • https://static.s123-cdn-static.com/uploads/4376359/normal_5fc9af498fdcd.pdf
    • http://kuworekokinig.medianewsonline.com/cable_gland_selection_chart_for_armoured_cable.pdf
    • http://vipimuxatomefi.medianewsonline.com/98632718056.pdf
    • http://stroy-level.ru/36306634254vry8c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://nopugorib.onlinewebshop.net/ayurvedic_gujarati_book.pdf
    • https://s3.amazonaws.com/zuvovoxigumuz/bartender_3_wow.pdf
    • https://s3.amazonaws.com/xoguwavosuje/pokemon_cards_online_games_free_no.pdf
    • https://s3.amazonaws.com/zuxime/piriformis_pain_in_buttocks.pdf
    • http://tebaputazaxuva.myartsonline.com/hoover_power_scrub_deluxe_carpet_washer_fh50150_replacement_parts.pdf
    • https://s3.amazonaws.com/tometubufimopim/ms_sql_server_2015_free.pdf
    • http://tuparibuju.atwebpages.com/new_year_calendar_2020.pdf
    • http://lopakesuzuw.atwebpages.com/zidukorepezodofijesot.pdf
    • 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_off0000f540.bin
727bb7010a760c53d3ea41696c34b80e47fae7312375c1a708a24f5ed08ab357		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 5240 bytes
font_01_sfnt_off00010725.bin
71eac3b0e602e97e81464724bcb6feea2c3de793140bcb98f25bd47c34830b3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10725 10712 bytes

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