Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdbc34c982e268c…

MALICIOUS

PDF

76.4 KB Created: 2021-03-06 07:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e797192236323f29ba370e3de46a73a4 SHA-1: f211db264cb79c66a437274aaf812e1e577fdc94 SHA-256: 8cdbc34c982e268c13fbbb57d7fc9f4603e1a4d42051024e89520661436324e2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a credential phishing lure impersonating Facebook. It contains numerous external URLs, with one specifically pointing to a redirector that leads to a PDF file hosted on Weebly, likely serving as a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/2832390.pdf.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://xezojetit.ru/wix?keyword=how+to+get+discord+id+of+someone PDF link annotation
    • https://cdn.sqhk.co/pigalixow/R1haigh/house_flipper_vr_ps4.pdfIn PDF document text
    • https://dezijetide.weebly.com/uploads/1/3/4/8/134864221/2832390.pdfIn PDF document text
    • https://miroguwitofenev.weebly.com/uploads/1/3/5/9/135958286/4987821.pdfIn PDF document text
    • http://febuvirot.22web.org/2582564960.pdfIn PDF document text
    • https://tisivuvuzudopur.weebly.com/uploads/1/3/0/7/130738638/xumevozo-sajurugu-nitowazuxo.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/iiDJY9P/gun_range_dallas_today.pdfIn PDF document text
    • http://xelipev.22web.org/ps3_emulator_for_android_apkpure.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/englander_pellet_stove_25-pdvc_top_auger_not_working.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/v2jgjh7/jijagaguvewinomax.pdfIn PDF document text
    • https://livaruzurakit.weebly.com/uploads/1/3/4/4/134432061/tidorusum.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/hp_laserjet_1320nw_driver_for_windows_7.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/XFLjagd/drink_bubble_maker.pdfIn PDF document text
    • http://nakekizedexu.getenjoyment.net/jotufewowolu.pdfIn PDF document text
    • https://cdn.sqhk.co/banuluwopote/iYhhDzY/kegegegabogaxak.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/fedure/anno_1404_starting_guide.pdfIn PDF document text
    • http://kaxumepidigiwe.rf.gd/del_mar_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/phosphoesters_form_the_backbone_of_dna_molecules.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/35752322246.pdfIn PDF document text
    • http://pekamidakoj.atwebpages.com/lord_of_the_rings_tamil_dubbed_movie_download_in_isaimini.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/medical_certificate_form_for_school_admission.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/renegoruzum.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/calendar_2019_template_to_print.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/an_astrologers_day_questions_and_answers_class_11.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_off0000ef96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 5152 bytes
SHA-256: da61bfb348c755c25391db9429617aec4312e4e8f09609773765c8678cfef3c8
font_01_sfnt_off00010125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10125 10272 bytes
SHA-256: a37a9462213591c4e88518da0e36f90c53260399966dcbc685d8460dad68fd63

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