Malicious PDF — malware analysis report

Static analysis result for SHA-256 25ebf7a295cdb78a…

MALICIOUS

PDF

67.7 KB Created: 2021-02-21 14:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 582c5c1d093463a4ece78872efc795fb SHA-1: a3176473c47bf05dfcb1cd9628a3f93dc13e2ea0 SHA-256: 25ebf7a295cdb78a84ccda6f5f47de64020287f72bafc71ee3f5eb30ed6cc3b4
264 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=adorna+properties+review In PDF document text
    • http://agentsecure.space/vukosomisenebogitekewopihppdg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450864/normal_5fd218c0d4fd6.pdfIn PDF document text
    • https://pewukuma.weebly.com/uploads/1/3/4/7/134762228/1141447.pdfIn PDF document text
    • https://bupafenanibud.weebly.com/uploads/1/3/4/0/134042845/mosilatup-daluma-nodexolivomun.pdfIn PDF document text
    • http://slmit.fun/gurijulfb5j5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449417/normal_5ffd55f35f19f.pdfIn PDF document text
    • https://jotavitot.weebly.com/uploads/1/3/0/7/130738821/c92ac.pdfIn PDF document text
    • http://vizit.store/68673507448mwy1e.pdfIn PDF document text
    • http://naturapple.space/xiwapofomirisojy6n1.pdfIn PDF document text
    • https://nopifabuda.weebly.com/uploads/1/3/4/6/134693299/tejevi.pdfIn PDF document text
    • https://delupizamima.weebly.com/uploads/1/3/4/5/134578079/bajotofobufik.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465390/normal_5fe49b8bce0a4.pdfIn PDF document text
    • https://sozejaras.weebly.com/uploads/1/3/2/6/132695734/pofanegejisoda_gafezixux_koxafaxu.pdfIn PDF document text
    • http://dragonflysagewellness.com/the_transactions_contemplated_hereunder1e4ry.pdfIn PDF document text
    • https://mejotozoferu.weebly.com/uploads/1/3/4/8/134866749/9172226.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446263/normal_5fe947e277581.pdfIn PDF document text
    • http://copyright-infringement.business/dofexixiregqkppy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://melamepapate.rf.gd/beko_pro_bxdf29300z_manual.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_off0000cd31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD31 5060 bytes
SHA-256: abf2896daf1ad1c40f38ab94dca47fe6f3a9fe8c9e673e1c2d5e9b2477533097
font_01_sfnt_off0000de86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE86 10340 bytes
SHA-256: 96f82f684a2247c67d84efa374ae87c91e78ec584ccd43477f04f727fdc6f04b