Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a525bd2b3dba88…

MALICIOUS

PDF

72.7 KB Created: 2021-02-13 05:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e7697a0773243047cfd410694c7d7a17 SHA-1: 69efbfb26f9fba8ae10422226908e0fa7f3e31dd SHA-256: a4a525bd2b3dba8898b29e672f6960e6e0e51980e6f642eb69d7f4a60aec5474
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=southern+high+school+covid+testing PDF link annotation
    • https://cdn.sqhk.co/mujekesire/6v0jgif/kodi_firestick_exodus_redux.pdfIn PDF document text
    • http://muldwych.com/3630787376710l20.pdfIn PDF document text
    • http://yandex-delivery.cc/zonamuvk12uq.pdfIn PDF document text
    • https://sojabejob.weebly.com/uploads/1/3/4/8/134890412/xomel_lafikatejom_jobofowi_nifawonus.pdfIn PDF document text
    • http://fb-copyright-help-from.com/rudeluvuxatadilikitasogafbczst.pdfIn PDF document text
    • http://counterman.ru/74095092035ytis9.pdfIn PDF document text
    • http://seomagnat1.online/email_blast_design_templatestauyv.pdfIn PDF document text
    • https://xivogere.weebly.com/uploads/1/3/0/9/130969247/1f23a132511f2d.pdfIn PDF document text
    • https://timijajuvage.weebly.com/uploads/1/3/2/6/132683040/6789588.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/hcifhh4/entergy_phone_number_baton_rouge_louisiana.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/larimamijutaxad.pdfIn PDF document text
    • https://cdn.sqhk.co/dexediwiboze/jg3haKQ/iron_out_meaning_in_telugu.pdfIn PDF document text
    • http://xevamaz.iblogger.org/27718626833.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/fLihqRa/vefexenelopisub.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/dikomavomem/country_number_codes_list.pdfIn PDF document text
    • http://dukejujegu.epizy.com/boyle_alberta_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/58473956849.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/lesusirifolepadomogafima.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/chrome_android_flags_settings.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/5986287099.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_off0000dc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC60 5156 bytes
SHA-256: e3cf8de6d4bf1901eb8f29da6e08aacc0c47ce5d58c053d8532534f37820a03f
font_01_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 12056 bytes
SHA-256: 4b1962b31260b82bd35195594b1f1a1cc353aef5a48c307b1ab8351064f08f48

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