Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5dc885f8c55082…

MALICIOUS

PDF

73.9 KB Created: 2021-03-01 19:24:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 44554bcd423dde79c64e99a610ac651f SHA-1: deb21636d518c2d7f310bbc18cf45f4af8a423ef SHA-256: 5d5dc885f8c550820e066670d837e04eb61c011ae8d617578ff2a46a1d65a4c9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/award?keyword=calculate+mass+flow+rate+of+air+from+pressure PDF link annotation
    • http://8gusevshop.space/20th_amendment_in_constitution_of_pakistancbmh2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420588/normal_6025b33218e2f.pdfIn PDF document text
    • http://hookup158.fun/sigmund_freud_books_chronology33s5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366351/normal_5fc844fee5005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379473/normal_6015e7b59ba96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_603bcecd90914.pdfIn PDF document text
    • http://artrosil.xyz/israeli_national_anthem_piano_sheet_music1ydm2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lobexot.epizy.com/parent_newsletter_template_word.pdfIn PDF document text
    • http://wetafemef.epizy.com/3d_racing_games_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/job_application_form_template_nz.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/arch_enemy_covered_in_blood_album.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/7400363092.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/anestesia_para_cirugia_ambulatoria.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/biblia_takatifu_ya_kiswahili_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/laurent_perrier_cuvee_rose_tech_sheet.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_off0000e521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE521 5160 bytes
SHA-256: 25408f90d479a59272d9f6e14b2a1246f0f995287fcf2d8bc42489bba21aed86
font_01_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 10504 bytes
SHA-256: 8c036ba87802c02f743d5c8ee2b40e46e5cd7c3376ab63759bb4a2380ed7c4e3