Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be67aa0f314bd4d…

MALICIOUS

PDF

64.0 KB Created: 2021-02-16 08:01:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5fcfa6a7938b84d5efbd1d8e9328544e SHA-1: 4d7b122a5b0b3b476e2809812f02857b09ab12d5 SHA-256: 3be67aa0f314bd4d4b4886b0d622296e94f2725c01ef27ae844c71342b635cf9
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://baarspo.ru/wix?keyword=big+ideas+math+green+answer+key+grade+6+chapter+1 PDF link annotation
    • http://pasetbs.xyz/naruto_vs_bleachcmtnq.pdfIn PDF document text
    • http://it50save.info/atlas_ti_descargar_gratis_espaolk3fkb.pdfIn PDF document text
    • https://basafokadu.weebly.com/uploads/1/3/4/7/134706648/8387660.pdfIn PDF document text
    • http://redita.fun/75354991716mw1ub.pdfIn PDF document text
    • http://erogan-encolumbia.site/libertango_violin_guitar_sheet_music1t3dl.pdfIn PDF document text
    • http://itawomen.fun/ro_mobile_labyrinth_forest_guidevyrwi.pdfIn PDF document text
    • https://dowebirajosem.weebly.com/uploads/1/3/6/0/136010559/mipunufapeg_vokusekuge_dojijuregikupup_suxesugule.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/wovugi/kukupavamiduwugom.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/66826681126.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/wijetugotijowewofuvizu.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/natelusifufuvekulurelipa.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/41855628724.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/97850118098.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/change_currency_format_in_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/brother_in_arms_2_apk_and_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/ralijuxefej.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/14382232985.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_off0000bbcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBCC 5968 bytes
SHA-256: 042f5dde1657e5990e0db9bcd82359d3e430fa9bd78fe95aff42d108fb545db5
font_01_sfnt_off0000d017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD017 10312 bytes
SHA-256: d15e14f2c2969d2add6dc5eba2a6c19ee5551fcdf4921c7e8f50712694a00548

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