Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c4b78d6bbcd9b8…

MALICIOUS

PDF

72.7 KB Created: 2021-02-13 08:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3b01da0d1c1a4afed33b3ed68b6729f8 SHA-1: f0cf36260c529c99e9009b1cf054bd4bd0e9d593 SHA-256: 85c4b78d6bbcd9b8b696c8c96a84dbac02831a2142b8efba72d7ab041cda92ea
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://leonvi.ru/aws?utm_term=mathematics+past+papers+pdf PDF link annotation
    • http://xikimubixod.22web.org/periodic_table_of_elements_alphabetical_order.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/xijad.pdfIn PDF document text
    • https://kopusinuzek.weebly.com/uploads/1/3/4/1/134131929/juloletotizol.pdfIn PDF document text
    • http://rowifir.22web.org/tifizukobiferuvatej.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zokudubogot.epizy.com/bringing_them_home_report_publisher.pdfIn PDF document text
    • http://kexafobe.rf.gd/annual_marketing_budget_template._using.pdfIn PDF document text
    • http://sozogakuvigoxev.epizy.com/deferred_comp_reported_on_w2.pdfIn PDF document text
    • http://dexedigobejo.rf.gd/himnos_y_canticos_espirituales.pdfIn PDF document text
    • http://palumigokaximeg.epizy.com/jurassic_world_the_game_hack_2019.pdfIn PDF document text
    • http://temekem.epizy.com/heart_scroll_border_template.pdfIn PDF document text
    • http://tunawibiga.rf.gd/sewatidanuvimida.pdfIn PDF document text
    • http://turebaso.epizy.com/additive_manufacturing_journal_paper.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/55281134928.pdfIn PDF document text
    • http://sikejilewiz.epizy.com/samsung_s10_android_10_t_mobile.pdfIn PDF document text
    • http://wofevumovef.epizy.com/newspaper_bill_claim_form.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_off0000e1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 5368 bytes
SHA-256: e149666d07b03cacbecd3e4d23fc895d9119b777c6ad675fa70c5ba7512a619e
font_01_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 10084 bytes
SHA-256: 21cff8cd6c06b04b2ba1792aa51ed460eda340e768ef444a32cb27800fcb003b