Malicious PDF — malware analysis report

Static analysis result for SHA-256 c92883d6b5e1f774…

MALICIOUS

PDF

71.4 KB Created: 2021-02-17 03:38:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7fe29bf4c3bb173cfa8a9c9d31289496 SHA-1: 5c7e6e6856eeb126fa27595e1eb307a6c98ee64d SHA-256: c92883d6b5e1f774bedd1003c95561c4e1c1d3acf9f8fea46f1a427e591f43a0
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=jean-michel+basquiat.+horn+players+%25281983%2529 In PDF document text
    • https://negogepif.weebly.com/uploads/1/3/0/7/130775604/1451047.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386852/normal_5ff5006d46147.pdfIn PDF document text
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/9216211.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/hc1Oogj/11663134323.pdfIn PDF document text
    • http://price-list.moscow/swann_n3960_dvr_manualgfnl0.pdfIn PDF document text
    • https://nogiwesetegi.weebly.com/uploads/1/3/1/6/131637024/tajepidizidutaku.pdfIn PDF document text
    • https://kajukijuxuvame.weebly.com/uploads/1/3/5/3/135329863/bedovagekefifupat.pdfIn PDF document text
    • https://cdn.sqhk.co/furafurume/s1yjghf/vefosufit.pdfIn PDF document text
    • http://mandarins.space/32035074584fw53u.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/vasowobo-zifobuka.pdfIn PDF document text
    • http://50offit.pro/schedule_template_monthly_2019suozk.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/xemuz_jirumajevojazuz.pdfIn PDF document text
    • http://geesecam.com/sabuxudinoxefux4f8w.pdfIn PDF document text
    • https://cdn.sqhk.co/forexajepusa/gdybhda/used_pro_audio_speakers_for_sale.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/jepavilutabilel/consumer_reporting_agency_free_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/42712738048.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/95796913886.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_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 6312 bytes
SHA-256: f89d52fb7b16e72ed534846decefd76697e66071a563a4ec1b6d7fbea56cc9ca
font_01_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 10648 bytes
SHA-256: 221580cb66ab2dc7a06c45994b8a750b84b3f36123d21aee1f8d8e8537e0f165

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