Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5e5769a0a06175…

MALICIOUS

PDF

67.6 KB Created: 2021-02-16 18:29:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2b627930d055c8c07c501516afee478a SHA-1: 5e891c900ca3fed46576b1a643d7e629fc233dc7 SHA-256: da5e5769a0a061753c190109a7b2440c606db7cf5b7c39e72258bc565b28cce0
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=answer+the+bell+instrumental In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374682/normal_602511ab87a71.pdfIn PDF document text
    • http://all-host.site/intertherm_electric_furnace_heating_elementerppp.pdfIn PDF document text
    • https://pugiputofal.weebly.com/uploads/1/3/4/7/134740318/visudapibanoboket.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/eghifhj/19766807808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_5fdc5f4c5c519.pdfIn PDF document text
    • https://cdn.sqhk.co/livisade/iggeheK/big_ant_farm_with_queen.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/h1thbib/fopiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401692/normal_5fcbf8289e039.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/pijorowizir_datazurezidopuf_gilono.pdfIn PDF document text
    • https://cdn.sqhk.co/sifolilo/fXaiiUy/doxiko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_600e76a8659cd.pdfIn PDF document text
    • http://favovuzoxegavix.22web.org/android_linux_command_prompt.pdfIn PDF document text
    • http://legendnat.space/10477048014dgdro.pdfIn PDF document text
    • https://ravijirigiraga.weebly.com/uploads/1/3/4/6/134649302/fojizulalebewevuza.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/bijJndv/download_truck_driver_cargo_mod_apk_unlimited_money.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/Dhigdhf/gerokomanizazivululegubo.pdfIn PDF document text
    • https://cdn.sqhk.co/pelotuwew/PALcyib/7274276085.pdfIn PDF document text
    • https://cdn.sqhk.co/baruduwege/usUgfhd/cross_stitch_flowers_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5B 5148 bytes
SHA-256: f7ca19eb648aa58ea9b5f469743ed052adc311f2fbb5f2cbf80064d13fea408d
font_01_sfnt_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 10196 bytes
SHA-256: 85e2df9c9077a49c8d145c1abd045e5c3547f3b1f3ad837554fcb649707d2c16

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