Malicious PDF — malware analysis report

Static analysis result for SHA-256 67383efef769186f…

MALICIOUS

PDF

65.5 KB Created: 2021-02-10 05:28:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: c253ee63b050eeb1fbf15815ac65f255 SHA-1: 471736f4d4d6422c927144f2d287bda3f329e310 SHA-256: 67383efef769186f70cc533b6cbd3bdaebb2f92c352c076fbafce20c144415aa
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/aws?utm_term=algebra+index+notation+worksheets PDF link annotation
    • https://vufobuvi.weebly.com/uploads/1/3/1/1/131163959/2325459.pdfIn PDF document text
    • https://tumozoredupoki.weebly.com/uploads/1/3/0/9/130969837/cdd8e9ee5b4905.pdfIn PDF document text
    • https://pagiburefi.weebly.com/uploads/1/3/4/1/134108706/wizasoninopaz.pdfIn PDF document text
    • https://mogomanazeveka.weebly.com/uploads/1/3/0/9/130969503/5722326.pdfIn PDF document text
    • https://ridoduna.weebly.com/uploads/1/3/4/5/134528127/gozigijig.pdfIn PDF document text
    • https://vokubopupabilu.weebly.com/uploads/1/3/4/6/134691430/furakemef-davawu-pagutejej-muruwipa.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/455784d81f1c21.pdfIn PDF document text
    • https://xejapekedom.weebly.com/uploads/1/3/4/8/134864907/xazot.pdfIn PDF document text
    • https://nufewaxitobazat.weebly.com/uploads/1/3/4/7/134748461/2a0ed47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6018853e2cfd4.pdfIn PDF document text
    • https://lugumeduzox.weebly.com/uploads/1/3/0/7/130740149/b09ef41be81eb3.pdfIn PDF document text
    • https://rirosivipoxutu.weebly.com/uploads/1/3/2/3/132302830/zopijefanixomug.pdfIn PDF document text
    • https://torusakewojowep.weebly.com/uploads/1/3/0/8/130814967/manazigor-nozan-sixosakovo.pdfIn PDF document text
    • https://fuvukajewub.weebly.com/uploads/1/3/3/9/133999399/7fdd362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcad1cc490af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC071 5440 bytes
SHA-256: a6631822f9fcd2383c7f912710fe8f8b7e841f3ff267f855243fdf0cf9e41f03
font_01_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 11160 bytes
SHA-256: 5958c0fd13b8ea6de1bf45e49595a6787a1e0fb8d3b073cb7bd8b3518bd50253

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