Malicious PDF — malware analysis report

Static analysis result for SHA-256 53985e9b9215fad7…

MALICIOUS

PDF

71.7 KB Created: 2021-03-03 03:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 33dbb81085305ad4be7c16d7c563b533 SHA-1: 1e1651b4cd3a1768ee6144968261eab877d72e4c SHA-256: 53985e9b9215fad7972786ca13c7fc9cdcaef615fb9b50c43f312243151b6ad1
186 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.
  • 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.
  • 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://maypoin.ru/award?keyword=how+to+use+air+hogs PDF link annotation
    • https://cdn.sqhk.co/limiwebu/jgqiii7/22417127131.pdfIn PDF document text
    • https://reponobokuwe.weebly.com/uploads/1/3/5/4/135401207/3887894.pdfIn PDF document text
    • https://luboguti.weebly.com/uploads/1/3/0/7/130739177/e928a9a3a.pdfIn PDF document text
    • https://cdn.sqhk.co/vavusiwi/hjgfqyI/penguin_running_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/sanevujaguda/lhfW5l3/kipepow.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485308/normal_6038b6214b2bb.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/6512614.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451927/normal_602e367064b91.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/Hgjjcia/17806926266.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/ygfQgd6/how_to_buy_on_ebay_with_paypal_credit.pdfIn PDF document text
    • https://lurotafimeka.weebly.com/uploads/1/3/0/7/130740015/zazajur-nawiduti-nifegeval-wiwared.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475720/normal_602c2abad27fe.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/gMgejbd/xewifuxakavaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fcbf24d55f66.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/sugowubuf/dapoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/rejav.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/indiana_university_hospital_chief_information_officer.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_off0000dc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC04 4968 bytes
SHA-256: a954e03f2330fb229f3641f86c06256b1cc88790bb1c2ddeeaf6e8a85963c254
font_01_sfnt_off0000ecf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF7 10748 bytes
SHA-256: dcae1c92fbd18bf6b7f36ac771713642cd2b038699ad5051c8125e75aaac13c7