Malicious PDF — malware analysis report

Static analysis result for SHA-256 228477748dd3e838…

MALICIOUS

PDF

72.8 KB Created: 2021-03-02 02:00:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4fd13c09f41d5b31727b03b85589cb6e SHA-1: d385041517179405481ae4fac09abae54976dc9e SHA-256: 228477748dd3e838bdea636c52572b626b85a9fbae0c5b83e66d63fd047b2e66
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://yafferge.ru/award?keyword=romeo+and+juliet+act+2+prologue+poetic+devices In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448535/normal_601e88e17e0f9.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/brady_bmp21_plus_label_cartridge.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/wezabegol.pdfIn PDF document text
    • http://vuzitofakomuj.22web.org/atomistique_paces.pdfIn PDF document text
    • http://lobabinuladeri.medianewsonline.com/sony_str-dn1050_firmware_update.pdfIn PDF document text
    • https://xurobogi.weebly.com/uploads/1/3/1/1/131163732/a8410.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452377/normal_5ff4f0a08801a.pdfIn PDF document text
    • https://pilonalamajavex.weebly.com/uploads/1/3/1/1/131164122/gelolor-pokezovopovar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470016/normal_5fed45e42449b.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/romeo_and_juliet_comic_book_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462696/normal_5fdc830176c7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370528/normal_5fda271b017c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jiporiri.rf.gd/vascular_malformation_leg_treatment.pdfIn PDF document text
    • http://ganusigesu.rf.gd/43783322429.pdfIn PDF document text
    • http://sewekovekejir.epizy.com/bidekujilipiluk.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/34911482238.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/d-link_dir-655_default_ip.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/11795044978.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/toshiba_synaptics_touchpad_driver_windows_7_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/nevugijamuxupem.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_off0000dfbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFBF 5668 bytes
SHA-256: 5a267d50e2004d06b5bc7870e71d89d45cea66bbf3bf8c90b35b9b4ec35374d2
font_01_sfnt_off0000f303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF303 10208 bytes
SHA-256: 8059615632f283616940b2b41c5aab579f6daca04506a43cd4678c868beb929f

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