Malicious PDF — malware analysis report

Static analysis result for SHA-256 08bd83f17b3e6cb7…

MALICIOUS

PDF

77.0 KB Created: 2021-02-15 03:56:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5a975140668f9b8207dc93318ebc8429 SHA-1: 2ff0fcdb406b6cf9a1f413ebdf14e27489adce22 SHA-256: 08bd83f17b3e6cb7f0e724e8f52e341ff51b1d0c229b79b167e99ab9eb8ebc61
194 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
  • 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.
  • 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.
  • 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://yafferge.ru/123?utm_term=cardio+dual+trainer+manual In PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fec56ba871d0.pdfIn PDF document text
    • http://mmmmmme.space/wasirefexovukemaguguzoditg7o7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425919/normal_6026e153f3c99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460232/normal_602875c17f7f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445866/normal_5fed68d20ad9f.pdfIn PDF document text
    • http://jadivaza.iblogger.org/assassin_creed_game_highly_compressed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5ff387a5b6019.pdfIn PDF document text
    • http://towuxubi.22web.org/animated_wallpapers_windows_10.pdfIn PDF document text
    • http://ylyn.ru/benoxo9om8w.pdfIn PDF document text
    • http://rutefozur.22web.org/wetugakevudaxulazezidela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463034/normal_6013847c47015.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/xoferuzu/44330701424.pdfIn PDF document text
    • https://s3.amazonaws.com/jexijer/proper_mla_format_annotated_bibliography.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/medical_certificate_for_leave_form_4.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/musesefozutetiburodufov.pdfIn PDF document text
    • https://s3.amazonaws.com/wizomoravazub/mandated_reporter_form_louisiana.pdfIn PDF document text
    • http://jomerijokera.rf.gd/cm_awas_yojana_up_online_form.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/xividodikanudunis.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_off0000f347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF347 4700 bytes
SHA-256: 0165e1f6c70a84f8a3af9b8e4efda128bca4b6f4e8127ef731106335395913ad
font_01_sfnt_off00010321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10321 10636 bytes
SHA-256: d1debf70a7efafaec89913ef5d02d85d89d1690fdc7812a77d0347a92a668641

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