Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a043870f23499a…

MALICIOUS

PDF

73.8 KB Created: 2021-02-19 07:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3640a6dc6a6914c69f7e31630b282614 SHA-1: 998407d7c42739471ab72b61725bfdac8a54c96a SHA-256: 34a043870f23499a59e95bbd59db6df8fa1439b4b2afb135b2e2d5ba0ea46452
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://yafferge.ru/wb?keyword=will%20a%20levels%20happen%20in%202021%20uk In PDF document text
    • http://xebobimifu.22web.org/stock_market_crash_again_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5feef8d4396cf.pdfIn PDF document text
    • http://letekidela.iblogger.org/forixi.pdfIn PDF document text
    • http://kekisire.22web.org/25762678953.pdfIn PDF document text
    • http://richmaya.site/deck_the_halls_trumpet_sheet_music_freeewx6z.pdfIn PDF document text
    • http://mifopevoruroga.22web.org/genetics_practice_problem_worksheet_answer_key.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/tigewibejageju/26390690119.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/formica_laminate_basalt_slate.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/bangla_waz_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/29397176254.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/82756745522.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/7567173223.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/cardiovascular_physiology_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/adairs_linen_sheets_review.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/mujodijivifideg.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_off0000e385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 5276 bytes
SHA-256: 1d7c0053330dbb41331acb14f76115731b90386e977cfc8c00b22df6ccfe6959
font_01_sfnt_off0000f589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF589 10952 bytes
SHA-256: 3bfb7fb4cdd84ea13980f8cd1e7c8bf2cddb4908291728e8da9cd5a799de573f