Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e1c3cf2cba1371…

MALICIOUS

PDF

73.0 KB Created: 2021-03-02 18:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f3804482aae4e305c6e68c3a84f8e16e SHA-1: c9af6ae7e834da6ceea2f2eb2decd054ca2a9808 SHA-256: 31e1c3cf2cba137170d1abefc0391a39f493d0aa1f9e328130d9854a34284d09
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://druttle.ru/wix?keyword=game+killer+apk+android+7.0 PDF link annotation
    • https://zefurevexas.weebly.com/uploads/1/3/5/3/135399706/4666173.pdfIn PDF document text
    • https://cdn.sqhk.co/gubogezemazo/hgjac0m/kifesogopupigulofawepir.pdfIn PDF document text
    • https://xozipirun.weebly.com/uploads/1/3/5/3/135324749/21d21f2de.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/xeriwe.pdfIn PDF document text
    • https://najoduvojubowi.weebly.com/uploads/1/3/2/8/132815002/loxanuwugu.pdfIn PDF document text
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/fofoxapadoxafus.pdfIn PDF document text
    • https://derigibi.weebly.com/uploads/1/3/4/4/134447264/ribekenumosefu_zilajivozu_wonadugo.pdfIn PDF document text
    • https://gubukaxonular.weebly.com/uploads/1/3/5/3/135349028/gulatofukisanes-xikiliborelup-xefojolarimet-jelodusumufuw.pdfIn PDF document text
    • https://lapomuxonadaxo.weebly.com/uploads/1/3/4/5/134584049/rekumevigapop_bedubokimokelir_vurovox.pdfIn PDF document text
    • http://jushq.pro/cazadores_de_sombras_runasqik4e.pdfIn PDF document text
    • http://clientbluebadge.com/ib_spanish_ab_initio_vocabulary_listp0axh.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/lakadutof/hernia_diafragmatica_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/award_plaques_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/kakeraxebuvitixagajaxok.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/valentine_day_2019_whatsapp_status_video.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/embroidery_alphabet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/84470917735.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/bachna_ae_haseeno_song.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_off0000dffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFFA 5276 bytes
SHA-256: cea9bf66257980be933b508ee08ef026fec4596080ecd3cd1a2b3caf97cc234f
font_01_sfnt_off0000f1e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E1 10340 bytes
SHA-256: 689bacce353c7085b99f681562d71d81b59713cbca868cc9e93a9f17df907072