Malicious PDF — malware analysis report

Static analysis result for SHA-256 e573d348977834b3…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 15:36:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: d906672187ea671599691459b69cd006 SHA-1: 5549e8baa8ab72de950cf9357ae3ca276bae34d8 SHA-256: e573d348977834b3cbf4a1ca3714d9f5f345477f3ff472eb7667f499be73c4a0
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document's structure and embedded links suggest it's designed to trick users into visiting compromised or malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=idaho+fish+and+game+pheasant+stocking+schedule PDF link annotation
    • https://cdn.sqhk.co/nevupediwix/jbSRiby/rezewotej.pdfIn PDF document text
    • https://baremilo.weebly.com/uploads/1/3/4/2/134234762/3845826.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/formato_de_hoja_de_vida_en_word_para_editar.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/88275423161.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/bugowixuromarij.pdfIn PDF document text
    • https://cdn.sqhk.co/ritapabinap/igaggHm/pixiz_photo_video_song_maker_online_download.pdfIn PDF document text
    • http://vivabozuna.iblogger.org/98027032696.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/how_much_is_a_route_44_drink_at_sonic_during_happy_hour.pdfIn PDF document text
    • http://wumorumomu.22web.org/bone_broth_recipe_nourishing_traditions.pdfIn PDF document text
    • http://wifusibumamoj.iblogger.org/xemubo.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/best_location_for_antenna_amplifier.pdfIn PDF document text
    • https://zavisedifigi.weebly.com/uploads/1/3/4/3/134316550/e4e49100.pdfIn PDF document text
    • http://waxinexedodupij.22web.org/how_are_you_doing_answer_negative.pdfIn PDF document text
    • http://poxumanavofeboz.scienceontheweb.net/xexetivoludipepibaxibexi.pdfIn PDF document text
    • https://fetepidema.weebly.com/uploads/1/3/4/6/134684810/f9f45a.pdfIn PDF document text
    • https://cdn.sqhk.co/segexiji/iaov5hj/84339722468.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/saxon_math_course_1_table_of_contents.pdfIn PDF document text
    • http://widokox.rf.gd/wofopaxazugamabupadamumeg.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_off0000dd70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD70 5472 bytes
SHA-256: bc4aab0011b756e719d9419d77b26912ac1e73c577bcb443fa06e0e02b2bda15
font_01_sfnt_off0000eff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF4 10152 bytes
SHA-256: c6742cc5943efad368255764d2c47919ecc96fe54054767b8fc1d35e7b79d854

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