Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b8df706fc7839c…

MALICIOUS

PDF

72.9 KB Created: 2021-03-01 00:29:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2b8cbc1f2705d9d346f479709c390733 SHA-1: 8ab3b34ba0830b37ffce45a59bd9b78863b4f041 SHA-256: 42b8df706fc7839cfeaf5debb8434e130a656769f2a6fd687d36727d042b5538
196 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
  • 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.
  • 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/award?keyword=what+are+the+stages+of+super%2527s+theory PDF link annotation
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/3951054.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/c729f5744ce.pdfIn PDF document text
    • http://govnosiakxws.online/gakejoxilivevepgo4ir.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/SYbgE0f/finavogasikavavit.pdfIn PDF document text
    • http://siankaanmexico.com/59489055113w9fho.pdfIn PDF document text
    • http://topfrag.rip/rent_agreement_format_kerala_malayalams7360.pdfIn PDF document text
    • http://huseyincanx.com/wafikisevawuv62az.pdfIn PDF document text
    • http://cmbespaceclient.xyz/how_do_i_get_sketchup_for_free_as_a_studentl4az4.pdfIn PDF document text
    • http://musofiron.ru/agent_vinod_movie_openloadtcrfe.pdfIn PDF document text
    • https://cdn.sqhk.co/xerolunem/iaXjhe8/42686468003.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/xamibudasagas/can_you_chop_vegetables_in_a_food_processor.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/wejavoxijikesotofatugawu.pdfIn PDF document text
    • http://vanomuwoz.epizy.com/pullover_hoodie_template_psd.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/kojewaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/arabic_keyboard_for_iphone_free.pdfIn PDF document text
    • http://tibofova.epizy.com/38424013792.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/23435717674.pdfIn PDF document text
    • http://pikoritefum.epizy.com/does_the_maserati_granturismo_have_a_ferrari_engine.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_off0000e236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE236 5280 bytes
SHA-256: bb9c9aff06b18eb437a6d68f8aed01e52c238361bf575ff265a606f654a3a59e
font_01_sfnt_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 10120 bytes
SHA-256: b9e1a3e608e05db562b9b1890477a722cc51e436380a93902d3b573f7ea62be3

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