Malicious PDF — malware analysis report

Static analysis result for SHA-256 a21f9a8ca2d951e6…

MALICIOUS

PDF

65.0 KB Created: 2021-02-06 15:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 20f9be5cec60f0ae52d98a0580161617 SHA-1: de1ac7f3365e2273c206f18d81723dbdae834c18 SHA-256: a21f9a8ca2d951e6dd976169b75b0d832671ddb8e1916635ee8aafa664375d0a
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=argentina%20vs%20qatar%20highlights In PDF document text
    • http://damizav.iblogger.org/luzonigakunu.pdfIn PDF document text
    • http://formblckr1.xyz/imdinin_gc_zet7e6po.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5fd3248a64dfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384026/normal_5fe2b3593e250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466391/normal_5ffbdf04a7c3e.pdfIn PDF document text
    • http://hamsterbig.com/vincent_dimaio_obituaryun7fg.pdfIn PDF document text
    • http://j3vnci4.xyz/jajek75wi1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451760/normal_5fc85201149a7.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/zuguvoxoki/aasma_ko_fir_jamise_song_mp4.pdfIn PDF document text
    • http://mupegutiwigo.epizy.com/live_football_tv_apk_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/vivipivazilozeluwikaser.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/easy_spelling_bee_quiz_answers.pdfIn PDF document text
    • http://xumugipetoje.epizy.com/cafeland_hack_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kovezodepugov/broil_king_regal_s490_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/3521884136.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_off0000c008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC008 5124 bytes
SHA-256: 8cc48482ba6fa01b70488514ab0022cf28d062c1a04417cc325f1151f606a95d
font_01_sfnt_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 11408 bytes
SHA-256: 18b7aa52e40c1800ba3149a87441a1c50940658b23ee260b4fe97299760ec26d