Malicious PDF — malware analysis report

Static analysis result for SHA-256 b79c6159d9e12712…

MALICIOUS

PDF

72.2 KB Created: 2021-02-15 03:10:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 836e6d0db7d6c9233fe3c85a5a8818e0 SHA-1: 786ca2e8ec2d706643c3f10774d0899b9a99175f SHA-256: b79c6159d9e127128abecea685c8fb6bc6e7f2a5af9302087d49e3a76829d830
136 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
  • 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/aws?utm_term=transforma%25C3%25A7%25C3%25A3o+isobarica+exercicios PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488574/normal_601242c606ca4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5fc68fb1acf68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496378/normal_6005246f36992.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487206/normal_5ffc32a8039a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503987/normal_5fd36b51e9881.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/gazivemon/sobusalopur.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/fonekarepo.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/52541697685.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/63158725368.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/double_sided_id_card_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/soul_movie_apk_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/advanced_life_support_course.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/working_of_automated_teller_machine.pdfIn PDF document text
    • http://fawituwiluke.epizy.com/wejuku.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/female_barbershop_quartet_sheet_music.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_off0000d62f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62F 5652 bytes
SHA-256: 0ff0678131783b36d16b47bb4d2adb22e2af3d0bf3167239d6a0e66d830e8888
font_01_sfnt_off0000e879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE879 13720 bytes
SHA-256: 41dc147d02d30f01d1c57692a8751e52f452edfca6fac0bbf429ce155108dd9e