Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb11813d7347796b…

MALICIOUS

PDF

71.8 KB Created: 2021-02-11 12:16:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 8044e42ffbefdae8b362401a0bc7ff58 SHA-1: f2c8da707b6b7fb5369e21a458c032bbbd59593a SHA-256: cb11813d7347796b9d72bf792547488cf40e9688867e8c7db9805c2518b00871
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=the+lonely+island+tour+review In PDF document text
    • https://bovikobugekut.weebly.com/uploads/1/3/0/7/130775803/lovana.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/HJlJggV/paynow_topup_telecel.pdfIn PDF document text
    • https://cdn.sqhk.co/davusegeb/MifEDjg/53268746944.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/cachorros_en_venta_ciudad_juarezwn7tq.pdfIn PDF document text
    • https://cdn.sqhk.co/sazobenapur/hejgZrY/nufipewitokuzurevovo.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/gjajdgf/jibixozotosidibiniro.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxarulenogu/zgemig3/word_nut_level_117.pdfIn PDF document text
    • http://pressit.fun/51008905528j52yg.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/949122380eb.pdfIn PDF document text
    • https://bupekotarox.weebly.com/uploads/1/3/0/7/130739944/8438933.pdfIn PDF document text
    • https://cdn.sqhk.co/nosamese/Pibjhhe/25059273006.pdfIn PDF document text
    • http://private-channel.site/chicken_little_storyhi8n1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nasuxenabo.epizy.com/jewellery_visiting_card_design_vector_free.pdfIn PDF document text
    • http://fusatepalu.epizy.com/mafafenujaju.pdfIn PDF document text
    • http://velumosak.epizy.com/95855187883.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_off0000db32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB32 5116 bytes
SHA-256: e28f52b060daf0ff4c7485a8956d8be8cce9e011885c2d917a6161630949bc17
font_01_sfnt_off0000eca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA9 11100 bytes
SHA-256: 95703686986b45ca701a39ac987a870a30a674c3ec2b7c8dedbff7c81b69fe36

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