Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb712c808bd1b2f2…

MALICIOUS

PDF

66.7 KB Created: 2021-02-24 02:14:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2297086a9e0f0f2c97c8df684ab35bb0 SHA-1: a9af43152d2b80827df9364ebc1a31597e1f4f47 SHA-256: cb712c808bd1b2f2f8937e4af12f2b0554d2086b54b031a238f44f8997fb56a5
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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=17.1+atmosphere+characteristics+answer+key+pdf In PDF document text
    • https://zavowije.weebly.com/uploads/1/3/2/6/132680855/ludogemawikal.pdfIn PDF document text
    • https://wesujugureju.weebly.com/uploads/1/3/0/8/130874517/welekop.pdfIn PDF document text
    • http://reliables.ru/20946863813yotka.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/wumigasulovebi_gezovulosuwuxux_bazapexugupa_majegesikaloj.pdfIn PDF document text
    • http://mawifit.iblogger.org/kijogixevebipo.pdfIn PDF document text
    • http://itfamily.pro/jamelemewomobulexitesat39ark.pdfIn PDF document text
    • https://monokuzofo.weebly.com/uploads/1/3/2/7/132741222/4cff4a3fb.pdfIn PDF document text
    • https://pixofanipadolu.weebly.com/uploads/1/3/5/3/135326367/33a919469de0d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bukarujinadir.epizy.com/28904411809.pdfIn PDF document text
    • http://sosagid.epizy.com/adobe_audition_1._5_user_manual.pdfIn PDF document text
    • http://dijutago.rf.gd/28126766981.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/jusisanepojinubipozidadux.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_off0000c741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC741 5692 bytes
SHA-256: ce9f25406b551dccf504eb39437d2841f6122a2b124b5aaa60888fa2c91a5984
font_01_sfnt_off0000daa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA8 10236 bytes
SHA-256: e50f6a8d698f6dc64d7064674ad17ef6896fc367d635a722e0016d4eb7940942