Malicious PDF — malware analysis report

Static analysis result for SHA-256 2827846362d4bf65…

MALICIOUS

PDF

76.3 KB Created: 2021-04-14 19:55:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 1e35668c0c14109f1378e15a8c133637 SHA-1: 21f4304ae4d25cfc45ac2ca5b3caeceb3a267ba7 SHA-256: 2827846362d4bf65d9625892cc40dfc3601385593cec1bdbf04beaed15f72118
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to search results, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=how+to+draw+a+rose+step+by+step+images PDF link annotation
    • https://cdn.sqhk.co/rivogigaweb/fUg2hih/vazuxozojelilazijajola.pdfIn PDF document text
    • http://romomikas.22web.org/tojamaputumutawuwadowuge.pdfIn PDF document text
    • http://komozazene.getenjoyment.net/canon_digital_rebel_xti_battery_charger.pdfIn PDF document text
    • http://xavesusefowale.mywebcommunity.org/21166456499.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/ixXEV9Q/hockey_nations_18_full_apk.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/kotoliperufowuba.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/anker_soundbuds_surge_manual.pdfIn PDF document text
    • http://ruvogodozipabiv.scienceontheweb.net/kolkata_map_file_download.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/Eha9vsW/food_logo_quiz_game_online.pdfIn PDF document text
    • http://pobadabodoz.scienceontheweb.net/how_to_get_free_final_cut_pro_x.pdfIn PDF document text
    • http://pakimudemezir.iblogger.org/bixikuno.pdfIn PDF document text
    • http://xefawojuj.mygamesonline.org/94125486752.pdfIn PDF document text
    • https://cdn.sqhk.co/rasepotobami/egjhjMi/featurepoints_get_rewarded.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/f7a07067-3630-4961-b0e4-b57778c500b1/singer_tiny_tailor_tt600_manual.pdfIn PDF document text
    • http://pamapubosozule.epizy.com/android_auto_2019_update_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f95ab432-be88-4f78-b56d-38eb2bf8fbe2/can_you_eat_cheese_on_the_17_day_diet_cycle_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff941a28-252e-420c-83fa-17f39e930f14/1538339572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b11fddd-e2bb-4271-8117-1e5eb24d64fe/why_is_fifty_shades_of_black_rated_r.pdfIn PDF document text
    • http://fejiremow.epizy.com/asdf_movie_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/zasowedegubixusixaxoxot.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/financial_accounting_and_reporting_in_malaysia.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/fivisigewerit.pdfIn PDF document text
    • http://sajoveguduv.onlinewebshop.net/sujekojedajut.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/how_is_austenite_formed.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_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 5544 bytes
SHA-256: 054fc41d22275931201a66ec2fb8237dcd6769b7a04ca0922906125e579771d1
font_01_sfnt_off0001001b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1001B 10316 bytes
SHA-256: b7c0792b191194a1139bb00afcab3773c18d580624ee6ca74333afd32e0ffbfe

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