Malicious PDF — malware analysis report

Static analysis result for SHA-256 b84455040444f4b6…

MALICIOUS

PDF

70.1 KB Created: 2021-01-28 00:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 863a2baac05cf8dca8d748ca10a71862 SHA-1: 08eb7385c77f76d66f43130198d04b5585e5fcd8 SHA-256: b84455040444f4b629817a48af436240db6ae8b965b02ade083d38cc27e574c2
144 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://druttle.ru/123?utm_term=wonder+2017+google+drive PDF link annotation
    • http://basofeveku.iblogger.org/80587116451.pdfIn PDF document text
    • http://xekokikimelaf.iblogger.org/tenant_surrender_agreement_template.pdfIn PDF document text
    • http://pipvip.ru/wifi_file_transfer_apk_for_pced55g.pdfIn PDF document text
    • http://newyearshop.site/fefobanebepadapefie4fmq.pdfIn PDF document text
    • http://godevibusaxinoj.22web.org/daddy_day_care_movie_review_worksheet_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/pitadewedobu/iaaijwv/27751006448.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/nufidibodudulad/48468891998.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/android_studio_debug_does_not_work.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/52643730351.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/21561033129.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/aim_trainer_free_no.pdfIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/eclipse_36_honing_guide_for_sale.pdfIn PDF document text
    • http://dogefifuga.rf.gd/exercise_present_simple_tense.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/xovejubumufubawegone.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/asian_countries_capitals_and_currencies.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_off0000d742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD742 5084 bytes
SHA-256: b56c2d3537b0055bbc098a8d4ea458d01afe5d30d6acccb25a676049dca79dfb
font_01_sfnt_off0000e8be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BE 10212 bytes
SHA-256: d485044c19fc7b15e70ca20bc0757dadcb3948de0489bceb7b95ee2bf2e3cd39