Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fb66bd5e9738bc…

MALICIOUS

PDF

67.7 KB Created: 2021-03-08 15:50:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5acea1f2ef8aaefc0188c9ae129f1c66 SHA-1: 879cd640b0bacdbc628069f434226b1425731caa SHA-256: c6fb66bd5e9738bc094b67550d8499f3481ebc94d7292ae08cef16e2604e4c2d
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://jottigo.ru/award?keyword=child+care+act+38+of+2020+pdf PDF link annotation
    • http://znalomstvavip.site/63416506135yk7tg.pdfIn PDF document text
    • https://vigoxanumevu.weebly.com/uploads/1/3/4/4/134466257/4553ec1c329757.pdfIn PDF document text
    • https://mebuduwo.weebly.com/uploads/1/3/1/4/131453299/6862246.pdfIn PDF document text
    • https://lidanoliki.weebly.com/uploads/1/3/1/3/131380598/leporolepanosexa.pdfIn PDF document text
    • http://alkostore.xyz/59991863070wxh6b.pdfIn PDF document text
    • https://kazawiluk.weebly.com/uploads/1/3/5/3/135384823/gatatiwupuki.pdfIn PDF document text
    • http://mefazezotaw.22web.org/84363099429.pdfIn PDF document text
    • http://leaninrzpd.site/gifixebijezunamoeim5x.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/fukezavazuj/investing_in_shares_in_india_guide.pdfIn PDF document text
    • http://tiborumaroxotob.rf.gd/autorretrato_sin_mi_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e8d4f70-383f-46cf-bdff-743c53fdbece/first_edition_dungeon_masters_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/lusik.pdfIn PDF document text
    • http://pifujisebakiju.epizy.com/16981791584.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/barney_will_stanton_characters.pdfIn PDF document text
    • http://fogiwomagivizu.rf.gd/penguin_english_readers.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/22395450097.pdfIn PDF document text
    • http://rexalovujomorox.epizy.com/troy_bilt_rear_tine_tiller_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/80475536206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d33120-ff6c-44ea-9756-10461be5abb4/how_to_charge_lefun_health_smart_bracelet.pdfIn PDF document text
    • http://nejasixefunik.rf.gd/philips_276e8vjsb_00.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_off0000ccc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC3 5600 bytes
SHA-256: d8a5f0d23e0fbd451ac293499a668ef527d46cbf491dbf20d04b3a062c34abb0
font_01_sfnt_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 10024 bytes
SHA-256: 971c4c2d2570a04dd294a97c73e59e200ec10c1cf7c1c10fde9fd0fd64bd7637

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