Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbd0a03bba32341…

MALICIOUS

PDF

70.8 KB Created: 2021-02-16 23:11:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bcf991943d97ab91158bf4810ccfa9f7 SHA-1: 389e8d61dbe6628f6807dc142c2d3096b024204b SHA-256: 3cbd0a03bba323411b26e0f2882fa144b25113451ab46f067496c980e74aa2e1
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://bologen.ru/wix?keyword=bud+not+buddy+study+guide+questions PDF link annotation
    • http://kukushka.space/arizona_corporation_commission_form_d_filing83lmz.pdfIn PDF document text
    • https://menesifewo.weebly.com/uploads/1/3/0/8/130814293/097846c50810.pdfIn PDF document text
    • http://noverst.xyz/unlimited_free_vpn_betternet_androiduunwn.pdfIn PDF document text
    • https://gabinabadebaxir.weebly.com/uploads/1/3/1/4/131408928/jisadilewakukijufi.pdfIn PDF document text
    • https://garanokuwepo.weebly.com/uploads/1/3/0/8/130874617/856878.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/51120035297si0r7.pdfIn PDF document text
    • http://stassikorskyi.com/lumonjzzpc.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/fjaii6r/inside_out_institute_training.pdfIn PDF document text
    • https://bapefakujina.weebly.com/uploads/1/3/4/4/134483882/luzivuvojevasi-nusepewoveb-dirosoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/jfjaDSj/duwofiwumuvomebanijegam.pdfIn PDF document text
    • https://lefazevi.weebly.com/uploads/1/3/0/8/130873710/9957005.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/xonobijikivo/33830124956.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/32737657305.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/28910210837.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/esmo_guidelines_extranodal_lymphoma.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/vukekutixani.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/biphasic_waveform_vertebral_artery.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/apk_pure_apk_file.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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 5072 bytes
SHA-256: 7356126673da0c32e646a4d53c132ea0f40111bf45cef7d201f39a01c7a2454f
font_01_sfnt_off0000ebe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE0 10084 bytes
SHA-256: 762e37746e7c9dafbc48b29b8baf8b5853f440560cab30de48bf4578fb14cde9

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