Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26c406fa4759ffe…

MALICIOUS

PDF

71.4 KB Created: 2021-03-04 19:13:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d044af6cf950d32894941a88a1b1f7cb SHA-1: 163f4c70da4ba321e10f114a068a495dcbc26b5c SHA-256: c26c406fa4759ffe07c117a250a79e0ab7c0ee3b0150623280a8e50979d0f7a7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains an embedded URI pointing to an external URL, likely intended to host or redirect to a malicious payload. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to exploit vulnerabilities or deliver a secondary stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/123?utm_term=how+to+cook+whole+rainbow+trout+uk
    • http://tameeniraq.com/37831953481y2j7w.pdf
    • https://cdn.sqhk.co/jabosuve/aUHIjfy/59600047110.pdf
    • http://study-english-02.space/18989364904bwpza.pdf
    • https://cdn.sqhk.co/tixunudixa/bKttie0/the_factory_jersey_city_menu.pdf
    • https://static.s123-cdn-static.com/uploads/4414501/normal_5fe2cfe2cdb3d.pdf
    • https://cdn.sqhk.co/wowixepis/Bjcjhha/troll_face_quest_video_games_2_level_13.pdf
    • http://coins24h.com/dufosibovefaladexajiyz4j.pdf
    • http://notdull-eng.online/what_are_the_5_stages_of_product_life_cycleqw22r.pdf
    • https://cdn.sqhk.co/sadopore/aRhhj3n/plus_messenger_vs_telegram.pdf
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5fc673ad92412.pdf
    • http://immorta-cross1.club/jejivubilob1hohq.pdf
    • https://static.s123-cdn-static.com/uploads/4479904/normal_5ff30f2011f5a.pdf
    • https://cdn.sqhk.co/vilubofi/cSmhaAj/9461643761.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aeb1803a-cdc4-47b3-ba2d-782486f2a550/how_to_charge_a_citizen_solar_watch.pdf
    • https://uploads.strikinglycdn.com/files/fa818208-b9c4-4b49-be47-081c97be9b6b/lixibegegifofe.pdf
    • https://uploads.strikinglycdn.com/files/815a6b31-9adc-4a0b-a7c7-19ff0096f330/propaganda_book_edward_bernays.pdf
    • https://uploads.strikinglycdn.com/files/79b32ee1-1882-4777-babb-bf1ef8825f4e/67735978358.pdf
    • https://uploads.strikinglycdn.com/files/56299703-d19e-49d6-bf2a-29cb2b0a5f03/fifty_shades_of_grey_free_download_filmywap.pdf
    • https://uploads.strikinglycdn.com/files/9df1b037-09e1-451e-9116-55bc2122a89d/para_que_se_utilizan_las_lineas_de_tiempo.pdf
    • https://uploads.strikinglycdn.com/files/9531641c-7379-4008-a55f-878fe928d901/balancing_equations_chem_worksheet_10-2_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/391d5cdb-3b19-47fa-aa84-96673a0e61ca/31433426451.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_off0000dad1.bin
2d4cb16952e1c8c1b6f05543efe02bba9970775b0638bd00f879b28a7c953c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD1 4968 bytes
font_01_sfnt_off0000ebc3.bin
cdf6aba5a5a07171c98cd886ff7bf44df8e956234c60cff50bfa0342ff624dbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 10232 bytes

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