Malicious PDF — malware analysis report

Static analysis result for SHA-256 44869dd1749eb3fd…

MALICIOUS

PDF

75.5 KB Created: 2021-03-02 15:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b23327ac8389d44f435f712601c60089 SHA-1: 2ae28225e53e49f5b34af7df1b60cf0f49b90bd2 SHA-256: 44869dd1749eb3fd5de0674c8e0c4cac3a827b78f617620b32201145f1f62b7c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://baarspo.ru/wb?keyword=run%20java%20web%20app%20in%20eclipse', suggesting a social engineering lure to trick users into clicking the link. No scripts were extracted, but the presence of external URIs and the ML/AV detections indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/wb?keyword=run%20java%20web%20app%20in%20eclipse PDF link annotation
    • http://meetcabinets.xyz/ejemplos_de_entrevistas_semiestructuradas_para_nios8y72b.pdfIn PDF document text
    • http://50offstore.info/59957298284u9pud.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/aUtjgtY/new_classic_train_simulator_the_true_style.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388067/normal_60110b655fba9.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/Qhb4ihq/free_call_call_free_free_text.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366302/normal_6000d2a1af758.pdfIn PDF document text
    • http://spainwow.pro/13898496732v9dft.pdfIn PDF document text
    • https://cdn.sqhk.co/jiguluzufuwa/0hhiec2/gijesexejoxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/iUQ0hdm/80682426061.pdfIn PDF document text
    • https://cdn.sqhk.co/letaziseb/hfgfNgi/wuzatuwijefotalibame.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/uhAJ6gj/green_bay_packers_game_schedule_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/G5hgBDB/list_of_enlisted_ranks_in_the_army.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/GSighbL/maxpreps_volleyball_rankings.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373281/normal_5fcbc5ce590c2.pdfIn PDF document text
    • https://cdn.sqhk.co/sojuzafu/eijeUge/kicking_horse_river_rafting_death_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489983/normal_5fef9bcfe4b6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412415/normal_5fe7dc088f6f3.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/foneniz/bombay_full_movie_in_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/odia_dj_song_free.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_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 5204 bytes
SHA-256: 35264122b8027785d85e64561cc097ac44179b13465079a35ec490ce7562d7e0
font_01_sfnt_off0000fced.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCED 10680 bytes
SHA-256: 4856f2310c6f5f1bd6093cc955aa1ef90e7920c656b02517b38ae62b3929b6f1

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