Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9ea847cfe27a9f…

MALICIOUS

PDF

77.4 KB Created: 2021-03-29 21:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 9d7b7337d945ede189d106273b213339 SHA-1: 2189162f835558d2ce206216e61ed6faa72875ae SHA-256: 0a9ea847cfe27a9fffec00b2d7e064f10011e77cd8b7286df0828ff8a7456a2c
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to a book title, further supporting the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=the+kybalion+a+study+of+the+hermetic+philosophy+of+ancient+egypt+and+greece+by+three+initiates PDF link annotation
    • http://carinsusa.com/rodugerabifebonu6gw9y.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421042/normal_6018398fbebc0.pdfIn PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/jiOU4jb/planet_smashers_merch.pdfIn PDF document text
    • http://fbdirect.site/71431310960c4bq5.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/Xj5hdQp/furniture_mod_for_minecraft_pe_1._12._0.pdfIn PDF document text
    • https://cdn.sqhk.co/dofulokune/Qghhjyb/global_tech_experience_change_simulation_answers.pdfIn PDF document text
    • http://easylearning.space/super_mario_world_2_player_rom4l1nl.pdfIn PDF document text
    • http://wemuwugisenoro.iblogger.org/analyzing_likert_scale_data.pdfIn PDF document text
    • http://yandex-delivery.cc/the_selection_series_book_2_summaryo2rlr.pdfIn PDF document text
    • http://tiboxul.iblogger.org/jugosok.pdfIn PDF document text
    • http://vurolak.iblogger.org/how_to_play_backgammon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469358/normal_60524bb2447f3.pdfIn PDF document text
    • http://chambrehq.xyz/10k_ohm_ntc_thermistor_datasheetaxrbz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fcfb300f054c.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/IJjbKig/another_word_for_colour_palette.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5ffe6daf2594f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_60102d2451673.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lulelepese/70632190225.pdfIn PDF document text
    • http://zadakirilavaru.rf.gd/how_much_do_freelance_developers_make.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/sumonejejab.pdfIn PDF document text
    • http://sizujuzefe.epizy.com/vogalu.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/50659663757.pdfIn PDF document text
    • http://duzujijola.epizy.com/general_ledger_accounting_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/duraflame_infrared_electric_stove_reviews.pdfIn PDF document text
    • http://velumosak.epizy.com/ph_meter_metrohm_691_manual.pdfIn PDF document text
    • http://jupexalamax.epizy.com/jay_corporation_budgeted_contribution_format_income_statement.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/life_beginner_a1_student_book.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_off0000eb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8A 5824 bytes
SHA-256: 64384ee16165f4341f7c81d4926ab2b0d018747e5b7f91011afdf4d20f8f07db
font_01_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 12068 bytes
SHA-256: 7c9a255203768c2fd5112957bd4b65088642211df414926383c50763026a03c7