Malicious PDF — malware analysis report

Static analysis result for SHA-256 de88606097b6fb54…

MALICIOUS

PDF

71.2 KB Created: 2021-02-13 22:53:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 626311ff3c502a369f93c93337bbaf9a SHA-1: 85fd39e2be9a1957790a6dbfc13b8ba2700bc4ce SHA-256: de88606097b6fb54cd2af9a1169722df0c68683daa5e85b13cd7b724f7054732
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=annual+credit+report+safe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418970/normal_60229d5cd6cbf.pdfIn PDF document text
    • https://judadumoxa.weebly.com/uploads/1/3/4/7/134718892/7344081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384628/normal_5fe7dd6005423.pdfIn PDF document text
    • https://kebufuwotum.weebly.com/uploads/1/3/4/0/134040355/rumozara-vixomuv-bukosuwalobuvi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420610/normal_600982216b5d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417807/normal_5ffa77bacbe32.pdfIn PDF document text
    • https://watilokid.weebly.com/uploads/1/3/1/8/131856522/lobenureze-dujerizuwuvibeg-govarewowufuseb-goledubiwijige.pdfIn PDF document text
    • https://rinotawobuv.weebly.com/uploads/1/3/4/7/134768279/buwarofawulu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465703/normal_5fdd991cd9f64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_601b3f6ab35be.pdfIn PDF document text
    • https://zodefamebatum.weebly.com/uploads/1/3/5/9/135967531/vifugimada.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/xapidajovaji/fun_math_brain_teasers_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/79076199459.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/70830273556.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_off0000da12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 5140 bytes
SHA-256: 1d5df01177aa601eb8e957cdfe7460fe54465c0985d2a61c9909c2d89d46f848
font_01_sfnt_off0000eb9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9D 10720 bytes
SHA-256: 21cd42bfeca875d511617679d300ffdbf6a9aba289b666d6389d575406c635cd