Malicious PDF — malware analysis report

Static analysis result for SHA-256 b64f36274fa2992f…

MALICIOUS

PDF

69.2 KB Created: 2021-02-16 04:17:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 35c42ccedb7b87ab7e06fedbff0024e2 SHA-1: 80e1fcf63c030cadfc3e40efec57a4f7cd5137c2 SHA-256: b64f36274fa2992ff9fa9e8a5dde86ca60f03099b72817fe922a227084bd04ad
136 Risk Score

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jacksth.ru/123?utm_term=democratic+leadership+style+in+nursing+pros+and+cons PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377704/normal_6020f8c6ce664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372355/normal_5fe59f0b9e085.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377102/normal_5fdcda74ad2ac.pdfIn PDF document text
    • http://romeoplanet.club/figuvukigavasopuvone60c43.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/wapabefizosumi/fedagibepimiti.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/new_my_boy_games_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/mcalister_s_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/pivetuzadujo/apple_reset_security_questions_insufficient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/62513329680.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/pefokiwawilanezovojipuva.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/5005720784.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/automation_studio_6._1.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/vojinamewikuwi.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/email_id_format_validation_in_java.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/la_la_la_song_ringtone.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_off0000d266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 5588 bytes
SHA-256: a17ba50583448102340ce54e6feaad2ccf709668364d75e258ae32c48245755e
font_01_sfnt_off0000e53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53F 9600 bytes
SHA-256: 4e70b2dcc032cba29382d478d2cb0fe615f146fb3e3e97667659f85b8bfdd67e