Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea69ac03cd34962…

MALICIOUS

PDF

127.2 KB Created: 2021-03-24 14:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 009501241293dc63cdd62a26c02d319a SHA-1: dd25fea7dcea1b9d258f1a56509adcd08a1d16d3 SHA-256: 5ea69ac03cd349621a8ba91df0846537973b4c88909e164f2ce7f7cf1de04f0e
154 Risk Score

Malware Insights

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

This PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'https://crophysi.ru/award?keyword=behaviourism+psychology+pdf'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URL and the nature of the heuristic suggest a phishing or redirection attempt, likely to deliver a malicious payload or lead to a credential harvesting page.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/award?keyword=behaviourism+psychology+pdf In PDF document text
    • http://rufefoj.iblogger.org/coordinate_geometry_questions_with_answers.pdfIn PDF document text
    • http://tedurelaseji.mygamesonline.org/vifoxu.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/biography_books_in_urdu.pdfIn PDF document text
    • http://larebalin.mypressonline.com/bacillus_subtilis_caracteristicas_generales.pdfIn PDF document text
    • http://skywonder.space/bangali_babu_english_mem_bangla_movie711eb.pdfIn PDF document text
    • http://hocostyle.ru/how_long_does_it_take_to_charge_a_club_car_precedentr2ki7.pdfIn PDF document text
    • http://zegobudipaju.mywebcommunity.org/definicion_de_biometria_hematica.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/suwuk.pdfIn PDF document text
    • http://korecos.ru/solving_equations_with_variables_on_both_sides_worksheet_with_answer_key_kutamb3lr.pdfIn PDF document text
    • http://mawifit.iblogger.org/iptv_apk_with_epg.pdfIn PDF document text
    • http://fumatiw.mypressonline.com/62013576923.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/kegovev/what_is_an_ip_infringement.pdfIn PDF document text
    • http://xivefasojag.epizy.com/82045652487.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/88974047612.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/19141122955.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/jedifukapukaluki.pdfIn PDF document text
    • http://lemuguta.rf.gd/zufarilipavexe.pdfIn PDF document text
    • http://fofiwufawiparug.epizy.com/used_manual_cars_for_sale_near_me.pdfIn PDF document text
    • http://nokejufesuw.atwebpages.com/city_of_ann_arbor_zoning_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/brown_wave_background_vector_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_off0001b372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B372 5780 bytes
SHA-256: 65a051ecf2def9e68d904b1ba6dcd45eec65378b9e25ec3c41aa87b79dbaf839
font_01_sfnt_off0001c708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C708 12116 bytes
SHA-256: 1558f76c78fde367972a75a6bb810b3473c827f509159589c36fff4210bac981

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