Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a8d0ebc0700aa7…

MALICIOUS

PDF

70.4 KB Created: 2021-03-18 23:17:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a1b4e1e1ae12064f3631701c36dfa058 SHA-1: c8f944f77f82449b1ff9f92d5b95b740b1fecce0 SHA-256: b7a8d0ebc0700aa7d5bf24fb8be17ab6c53b5ab831cdfda9d45728a0d63cfc74
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://jacksth.ru/award?keyword=biology+notes+for+class+9+icse+pdf PDF link annotation
    • http://f13x.xyz/29660049933vdb7u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_60268fa1c5284.pdfIn PDF document text
    • http://zanartcc.net/where_is_the_drain_filter_on_a_top_load_lg_washing_machinetkyer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421476/normal_600516713c6bd.pdfIn PDF document text
    • http://zoosalon.org/ram_capacity_dell_studio_5404v1zc.pdfIn PDF document text
    • http://naturaitalia.space/57095515681hlv5q.pdfIn PDF document text
    • http://natfreshik.fun/26309479195xbeiq.pdfIn PDF document text
    • http://sluzhba1.net/luxagukokasexinuo125k.pdfIn PDF document text
    • http://mebel-albero.ru/38020807010j1j97.pdfIn PDF document text
    • http://tendernes.ru/surfboard_sbg6580_all_lights_flashingpqxs0.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/bogeguva/time_worksheets_year_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f75e7b-e31b-4e24-b147-4701da2ba9d2/physioex_9.1_exercise_3_activity_5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be5dd983-435b-423b-99e9-d35f180bff52/what_to_cook_in_a_rice_steamer.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/interior_designing_universities_in_usa.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/15827993131.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/descriptive_statistics_in_psychology_research.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/adjectives_worksheets_3rd_grade_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c66c276-691e-43c9-873c-da5306547ac4/how_to_make_a_person_fall_in_love_with_you_online.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/super_mario_3d_land_4-5_star_coins.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/3286528258.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_off0000d374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD374 5628 bytes
SHA-256: 4e4a07057b349b7ab011764730e75a3039b10569dc94051906549e16e2ab12c8
font_01_sfnt_off0000e6c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C2 10484 bytes
SHA-256: f1a708e7fe0143d61ac4131e2a9c38fda581a79fba2b4ae7978122daa4c5d529

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