Malicious PDF — malware analysis report

Static analysis result for SHA-256 f35ef104d2c7435f…

MALICIOUS

PDF

63.5 KB Created: 2021-01-22 16:52:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f64578a649d70d959468970a7c20ad09 SHA-1: d01a717bf756d6115910215b8a795cdc2c2be1ee SHA-256: f35ef104d2c7435fa43c9713770857175892be25648f5935d47f5dcd5cf19bae
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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.
  • 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/123?utm_term=percy+jackson+4+pdf+free+download In PDF document text
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/jovafojuvedifogef.pdfIn PDF document text
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/38f62.pdfIn PDF document text
    • https://boxenujanazikof.weebly.com/uploads/1/3/5/3/135302290/8cd7d95104.pdfIn PDF document text
    • https://kavekoda.weebly.com/uploads/1/3/5/3/135326791/9233935.pdfIn PDF document text
    • https://site-1194646.mozfiles.com/files/1194646/arrhenius_equation_practice_questions_and_answers.pdfIn PDF document text
    • https://site-1168401.mozfiles.com/files/1168401/samsung_voice_recorder.pdfIn PDF document text
    • http://waniwidolo.66ghz.com/apple_boot_camp_4.pdfIn PDF document text
    • https://site-1171745.mozfiles.com/files/1171745/wizixuwifalagam.pdfIn PDF document text
    • https://site-1168108.mozfiles.com/files/1168108/kojajipagoxuvizarusa.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/hbhiht6/rodoxeveximujijax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ladorum.epizy.com/71828456269.pdfIn PDF document text
    • http://wulimazef.epizy.com/barracuda_ng_firewall_admin.pdfIn PDF document text
    • http://jitelujojutomu.rf.gd/reacciones_de_alcanos_y_alquenos.pdfIn PDF document text
    • http://pumusejori.epizy.com/gopro_cineform_codec_windows.pdfIn PDF document text
    • http://guzimuj.rf.gd/bible_audio_kjv.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_off0000bc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC46 5572 bytes
SHA-256: c7461ed46e316946fd076d26efb49eeed9ce3f01a4b6d4f9f35eeae472c3c4c0
font_01_sfnt_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 9988 bytes
SHA-256: 00d29c0987779cda037156d5978b56fdf6b353c4cc92729a6766fd7e7568435c