Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef5624089485a9ec…

MALICIOUS

PDF

70.4 KB Created: 2021-02-26 13:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: be01767a7796a5f12e4114144d58a2a4 SHA-1: 9f95bbe6579fcf0b70233755ace7f2eac211ea59 SHA-256: ef5624089485a9ec88332d9f9df14279df38d4d8cd7b14798caa35c073a4e1a2
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=walter+riso+pdf+amar+o+depender In PDF document text
    • http://kayikciakademi.com/good_luck_chuck_download_300mbftt25.pdfIn PDF document text
    • http://lixodamevurobar.mygamesonline.org/dell_latitude_e7450_price_in_bd.pdfIn PDF document text
    • https://zomipawir.weebly.com/uploads/1/3/4/8/134899005/fepemuz.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/intel_display_audio_driver_windows_7_64_bit_dell.pdfIn PDF document text
    • https://xewidepomizexas.weebly.com/uploads/1/3/0/7/130775014/pufalufesaziz.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/12881846962.pdfIn PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/tunidikukotinos-pexiwavenat.pdfIn PDF document text
    • http://masajsalonunuz.com/11_snf_konu_anlatml_kitaplarvdg3d.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/vebevibit_lawadujuje_zogefu.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvibabezel/i0hihbt/whatsapp_notification_sound_android_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/takodutezafokolamaj.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_off0000d9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B9 5200 bytes
SHA-256: 16de1329ee271d3ca70716fdebacd246a6eb50253de81f3530e5b79bef8f986a
font_01_sfnt_off0000eb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB65 9864 bytes
SHA-256: 547e85466f2a7083249efdfc41ad33833a42ab28034578a15e00b03daa3b8164