Malicious PDF — malware analysis report

Static analysis result for SHA-256 b61856813b82c9f2…

MALICIOUS

PDF

69.4 KB Created: 2021-02-12 20:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 390d848ed420b5fe4392df2e386f3cc6 SHA-1: 9d7f3b7c277f788c09d84f5e5be60c5404e6bc4a SHA-256: b61856813b82c9f28147d87f50923c92aa8291834532c7e337096a334934723c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=riddle+school+5+walkthrough+tile PDF link annotation
    • https://xukotonaxi.weebly.com/uploads/1/3/1/4/131453431/ditudiriwuzopa-katabuxab-nasup.pdfIn PDF document text
    • https://dorulitonen.weebly.com/uploads/1/3/1/3/131380258/7458240.pdfIn PDF document text
    • http://info-pages.ru/vewevokamodewz940x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481695/normal_600b65963afd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466391/normal_60112527bc5b6.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/6978396.pdfIn PDF document text
    • http://antonioit.space/snow_bros_video_game_apk_download6e3ua.pdfIn PDF document text
    • https://cdn.sqhk.co/zujagepax/dmpgjfv/kpop_artist_dean.pdfIn PDF document text
    • https://cdn.sqhk.co/pemazekefise/cie1heM/naxej.pdfIn PDF document text
    • http://halfraire.xyz/guidewire_san_mateo_cazh0jc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_5fd3a667a8eae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_600d4fc931f35.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/debamijizozexo/cover_page_of_project_report_sample.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_off0000d201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD201 5488 bytes
SHA-256: 9325bc572c814421368aacf9c5a1de03e485923245e53b0809bb46f98e0b9eaa
font_01_sfnt_off0000e4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C5 10628 bytes
SHA-256: 5bb26017e01237fab446f04aac7809d021d55d8e7a1c1656b5ad6ae3fdfb45ca