Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7c5d5569eadcd87…

MALICIOUS

PDF

65.4 KB Created: 2020-12-09 05:45:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 87a64e94227f59125efc49f537a21f59 SHA-1: 25be956952d56932280e106af98137f5e75d7558 SHA-256: a7c5d5569eadcd873e0ab65e573dbe09222b27c8df68f63ff78fb74d72056552
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://traffnew.ru/wb?keyword=best%20video%20editor%20for%20android%20free PDF link annotation
    • https://pufoviram.weebly.com/uploads/1/3/4/5/134580195/vepeguxosud-biwekumugopoz.pdfIn PDF document text
    • https://nanagimub.weebly.com/uploads/1/3/4/6/134632235/nolola.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412394/normal_5fad9e45ac915.pdfIn PDF document text
    • https://gamevuwi.weebly.com/uploads/1/3/4/5/134525912/fb53437489e2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f9788ffb9e85.pdfIn PDF document text
    • https://ditomivowulute.weebly.com/uploads/1/3/4/6/134679561/laberazipowu_tefaguk_raledi_viwupod.pdfIn PDF document text
    • https://lurukise.weebly.com/uploads/1/3/4/4/134454795/4769269.pdfIn PDF document text
    • https://vaxeratomox.weebly.com/uploads/1/3/4/3/134397216/1952515.pdfIn PDF document text
    • https://vorevowupi.weebly.com/uploads/1/3/4/6/134633589/4630882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f875f3631dfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_5f950e08da471.pdfIn PDF document text
    • https://zijavenokin.weebly.com/uploads/1/3/4/3/134315340/9187928.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/farowug/temenube.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/92865463752.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/hotel_formule_1_autoroute_du_soleil.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_off0000c574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC574 4980 bytes
SHA-256: 18c7a26bad7882b1ba6a78c10504173fcc15d8682e611242092c4fe9505b4d66
font_01_sfnt_off0000d679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD679 10132 bytes
SHA-256: ec8613ce30d540bf9321791fc027dd23f18f8568037b141443921c016db2b574