Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bafea35ea9066d7…

MALICIOUS

PDF

69.6 KB Created: 2021-02-05 23:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 78bc930032f2bfe7fd95c1255cd33ff7 SHA-1: 1290c0eeba9d0b1591fd72e7388b6332c2ef39ee SHA-256: 4bafea35ea9066d799a83fae49bbfec842b25bdb5701ef8dfb597ad04e2cbe8b
194 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.
  • 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.
  • 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/wb?keyword=jolly%20phonics%20phase%205%20worksheets In PDF document text
    • https://cdn.sqhk.co/japewaturu/igja8jh/dragon_quest_8_3ds_alchemy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/igiuVNu/times_square_ball_drop_2020_tickets.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/tufujifinobiro/38907096253.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/injury_report_chiefs_vs_chargers.pdfIn PDF document text
    • http://kebafitesulodu.epizy.com/21449786302.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/61060713296.pdfIn PDF document text
    • http://zigubogujivo.epizy.com/farinevarivabefibuga.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/phoenix_os_boot_error_android_x86_64.pdfIn PDF document text
    • http://bapexuzajo.epizy.com/97968212641.pdfIn PDF document text
    • http://zovebosovu.rf.gd/gowuxuladibatuneb.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/beoutq_sport_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fulosobezur/candy_bar_wrapper_template_for_word.pdfIn PDF document text
    • http://jexiduro.rf.gd/xesoru.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/assassin_s_creed_3_ps4_trophy_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/riesgo_cardiovascular_preoperatorio.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_off0000d3bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BB 5392 bytes
SHA-256: 3cac35eb9e9065ee6342191c254bbc0dbf87cf42b2007b5fbbc518029ca1faa5
font_01_sfnt_off0000e626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE626 10272 bytes
SHA-256: 2cb64da62fc358d06dd7e22a088865b788700e13dbd957b5429afc7d368500db