Malicious PDF — malware analysis report

Static analysis result for SHA-256 439586d65e2d6967…

MALICIOUS

PDF

77.9 KB Created: 2021-01-21 16:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 317a1d339a09507d3113c701691ec5ce SHA-1: aa932bcfe761788624bd0ed2c5486b7ac4ad46c7 SHA-256: 439586d65e2d6967353977d255315f0ad7cfb889682d04b8e8e65d5a73842b48
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://maypoin.ru/wb?keyword=zombies%202%20movie%20disney%20plus%20release%20date PDF link annotation
    • https://fubexomufepa.weebly.com/uploads/1/3/4/8/134850999/gewid-givefemajunubun-furadu.pdfIn PDF document text
    • https://fafefojesuvun.weebly.com/uploads/1/3/4/6/134651362/lopot_nuladurivare.pdfIn PDF document text
    • https://begosibaluta.weebly.com/uploads/1/3/0/7/130775163/b6e7f487638d8d.pdfIn PDF document text
    • https://zulunapakaf.weebly.com/uploads/1/3/1/0/131070820/440231b3c13faf9.pdfIn PDF document text
    • https://site-1166673.mozfiles.com/files/1166673/space_shooter_galaxy_attack_para_pc.pdfIn PDF document text
    • https://bekogome.weebly.com/uploads/1/3/1/4/131454098/5616889.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/8ucmheu/4056561055.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/rizezobabub/amt._dll_cs6.pdfIn PDF document text
    • https://s3.amazonaws.com/rudelazifizuvo/sequence_card_game_board.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/general_chemistry_quiz_questions_and_answers.pdfIn PDF document text
    • http://fusuxitizubuka.epizy.com/37334125427.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/canon_driver_configuration_tool_user_s_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/84111795453.pdfIn PDF document text
    • https://s3.amazonaws.com/xomudufe/boca_grande_fl_red_tide_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/concurrence_letter_template.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_off0000f44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF44D 5496 bytes
SHA-256: 17518c66cb90b80c1ed733cd45655b9679b072caeea825a13154cbac966145ea
font_01_sfnt_off000106e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E8 10552 bytes
SHA-256: f3c69b5d0ed43ac73b6b30b0d0cad7b57eb3a4b8bad0f30ab9ef96961b3c49e0

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