Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d9a0e7b31213ef…

MALICIOUS

PDF

71.2 KB Created: 2021-02-21 08:45:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a8f7a8d46219d69b09e8a796b89dfc03 SHA-1: 881667585399c89ded255c657a50a4ee2828b2dc SHA-256: 23d9a0e7b31213efbfbdb5a4c38f6959449e09589f793b267806e1a70cb9aeeb
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake encrypted/secure-document view lure high SE_ENCRYPTED_DOC_LURE
    Document claims to be an encrypted or protected file that must be opened through a 'secure view' link, and the action link uses deceptive infrastructure. This is the secure-document credential-phishing carrier: the page imitates a secure-mail / document-cloud gate while the link leads to a harvesting site. action link to abused redirector.
  • 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/wix?keyword=feed+me+tacos+5k PDF link annotation
    • http://setovewurepenu.22web.org/xuwifolemalulogiwote.pdfIn PDF document text
    • http://vovality.club/ata_hyperthyroidism_guidelines_20151f5bc.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/gpOaogi/venusopapiduparikopewow.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/QhbjbWI/kufutelaparurefoxatedumo.pdfIn PDF document text
    • http://vekvelo.ru/your_best_life_now_joel_osteen3rj0n.pdfIn PDF document text
    • http://cocobeautybar.ca/brasseler_endosequence_handpiece_manualxk1wk.pdfIn PDF document text
    • http://generalmassage.online/30104367776zi23s.pdfIn PDF document text
    • https://mumovukejepi.weebly.com/uploads/1/3/1/4/131483147/4100811.pdfIn PDF document text
    • https://cdn.sqhk.co/soxuvezosapa/9igVSCV/50134341599.pdfIn PDF document text
    • https://cdn.sqhk.co/vefapatape/i0hcigV/modern_air_combat_3d_hack_game_download.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/zubuwujoxom/aap_bright_futures_guidelines_for_health_supervision.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/17314182171.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/letter_l_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/retirement_budget_calculator_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/cnco_pegao_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/what_to_bring_to_rmv_for_license.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/27586720687.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/c._i._d_full_form.pdfIn PDF document text
    • https://s3.amazonaws.com/pekatikisuruki/36422012391.pdfIn PDF document text
    • http://nafabumawo.rf.gd/hyderabad_real_estate_report.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_off0000d973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD973 5100 bytes
SHA-256: c1da8acab60b1a326f3e0287f9abfc6796c351fe407a63f82359373712b6167c
font_01_sfnt_off0000eac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC2 10772 bytes
SHA-256: b0a7498271f8ecb9f8069423234a868ebbb729f3bc2b67bbf84a767260d83754