Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c839ce765352d4…

MALICIOUS

PDF

72.9 KB Created: 2021-01-31 22:39:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 88d3c0564f5a39002ba5cb31c109f1ad SHA-1: 047264bfa54ab69cb8c2a632c6115a7a14478e0a SHA-256: 20c839ce765352d4dbff86e4307e9474c1957e3558fe0a085008f69607d5410f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/aws?utm_term=atheros+ar9271+wireless+network+adapter+drivers PDF link annotation
    • http://1gusevshop.space/ginifivusumasomn7u4.pdfIn PDF document text
    • https://cdn.sqhk.co/junigofulum/gjdjaid/52807626003.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467979/normal_5ffc8b79dc9ec.pdfIn PDF document text
    • http://kir.center/fefakubidiftwiad.pdfIn PDF document text
    • http://cz-nitrof.website/castle_after_the_storm_review_guardianbs3aj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fdb94f8d2b97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465564/normal_5fd30a0cca067.pdfIn PDF document text
    • https://cdn.sqhk.co/vawadawuleja/fjiNgfE/7281734591.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/divexikav/business_letterhead_design_free.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/romibafezumiw.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/tezimovixunikagalezegin.pdfIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/can_can_music_sheet_flute.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/calgary_information_technology_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/tudajapilokukebeguki.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/templates_for_birthday_invitations_50th.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_off0000e16d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16D 5672 bytes
SHA-256: 46b84436cb580eb86218099e03da08a3a3c46dc41884abed1351ecd94ba947eb
font_01_sfnt_off0000f4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4CE 9924 bytes
SHA-256: 318d7e109701b9bddcbd5fe18a6bb5af069d118894a033e3e0ee6b83de4bd1a2