Malicious PDF — malware analysis report

Static analysis result for SHA-256 a433238eb4cc4465…

MALICIOUS

PDF

72.5 KB Created: 2021-03-02 22:21:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c3957296fd010c93f71c73b3dd2099c6 SHA-1: 03f82208943a1f88d8e2649b8c12dc76eeff95b5 SHA-256: a433238eb4cc4465d840f976aa889d6d229727828f541df69bbaeb157fda2e50
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/wix?keyword=unblocked+games+bomber PDF link annotation
    • https://cdn.sqhk.co/vumatoxikom/jb7IjaN/moputopofuwedunuba.pdfIn PDF document text
    • https://gipurafesab.weebly.com/uploads/1/3/1/6/131637457/89a61dfe6e5b4a.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/2iijib1/pabizirela.pdfIn PDF document text
    • https://janepaxe.weebly.com/uploads/1/3/4/0/134097288/tozemi-litovi-wegixetanutufal.pdfIn PDF document text
    • https://sorasewemo.weebly.com/uploads/1/3/4/3/134358680/5823434.pdfIn PDF document text
    • https://lexugorubu.weebly.com/uploads/1/3/0/7/130776619/gotazelejo.pdfIn PDF document text
    • https://fabevapomuwi.weebly.com/uploads/1/3/4/6/134607330/dee0f9da8.pdfIn PDF document text
    • https://pudibapajupi.weebly.com/uploads/1/3/3/9/133986481/zoxalikugu.pdfIn PDF document text
    • https://duvafoxugijotad.weebly.com/uploads/1/3/5/3/135305538/4408374.pdfIn PDF document text
    • https://nupanirosum.weebly.com/uploads/1/3/4/8/134858368/jimigut-tivex-vimarogelek-takusonejulebam.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/sakaburepagase/voltas_ac_remote_app_for_android.pdfIn PDF document text
    • http://rapuzivawa.epizy.com/cancer_de_prostata_urologia.pdfIn PDF document text
    • https://s3.amazonaws.com/supefujoxopubu/bildschirm_drehen_android_samsung.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/citizenship_in_the_community_completed_workbook_answers.pdfIn PDF document text
    • http://dalapodomunok.epizy.com/yesterday_weather_report_in_tirupati.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/21851355453.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/93870745178.pdfIn PDF document text
    • http://vuwejamadadodi.epizy.com/fufazumerumig.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_off0000de98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE98 5456 bytes
SHA-256: 93aeb93341a18403a5ae5b9f59099ac771f86a96ad448d76029ccef5bfb774b8
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 10424 bytes
SHA-256: c4897a0d9c524311060da07973e3afd0302559eecf70ed8bbb21befccaa5c25c

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