Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50582430a6c6e31…

MALICIOUS

PDF

73.2 KB Created: 2021-04-12 08:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c32132c1c07fc01cbb7864bdfb0f6b27 SHA-1: 13781d5c5b64cb13644710f02ed65673386b80b7 SHA-256: a50582430a6c6e31ecb268ea603c07bf887ab30dd5ae76934e99d60c30bc92d4
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=context+clues+worksheets+pdf+grade+5 PDF link annotation
    • https://cdn.sqhk.co/widexerun/j0Fe2hj/nfl_game_scores_and_standings.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/f8d6mtm/police_siren_sounds_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/0ig6ieO/71273807524.pdfIn PDF document text
    • https://cdn.sqhk.co/gazejuruni/didCxEP/danef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413465/normal_60346fd455c74.pdfIn PDF document text
    • https://cdn.sqhk.co/texojijoraso/hcvjiha/snake_vs_block_cool_math_games.pdfIn PDF document text
    • https://cdn.sqhk.co/jotapepikota/DlqGWje/spacex_crew_dragon_live_tracker.pdfIn PDF document text
    • https://cdn.sqhk.co/zelirusezi/igeOmhf/capacitive_proximity_sensor_working_principle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456998/normal_6060a56d71a29.pdfIn PDF document text
    • https://cdn.sqhk.co/nebinefis/gcjcjgR/cross_stitch_christmas_stocking_kits_dimensions.pdfIn PDF document text
    • https://cdn.sqhk.co/tobijoge/igajdnz/51397865964.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/nhcihhb/fegujowapowasosafizeji.pdfIn PDF document text
    • https://cdn.sqhk.co/dasupejej/E0dhaOM/25638025059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377902/normal_5fe7aed4d4705.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/7dd0f3fb-c36c-46f3-bb20-48f322330de1/what_size_tires_do_i_need_for_a_2008_ford_escape.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/georgia_on_my_mind_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/wudusesovumof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e30b144-6333-4109-9ce7-ca663099017c/11402815829.pdfIn PDF document text
    • https://s3.amazonaws.com/gateme/how_long_does_it_take_to_cook_hard_boiled_eggs_in_a_pressure_cooker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dafe0220-d1aa-41f4-9d30-7da27c5e1297/best_lean_six_sigma_certification_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d916d73-d8ee-46db-b4ba-852c28e8fde8/irritrol_r8969_rain_dial_outdoor_ext_replacement_key.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_off0000dff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF7 5668 bytes
SHA-256: 9c1a68b11b4a91c57d72b2228109686de99fd5db2c8c2dfae297d77761077832
font_01_sfnt_off0000f35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF35F 10364 bytes
SHA-256: 1d29392d8c506ce5e30a1c39840e0888b0bb1d703ec01fc07f496cf392693298

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